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The Energy of Light Solutions Library

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151 solutions

The Energy of Light

Q. How can I calculate the number of photons emitted per second?

Solved • Nov 12, 2020

The Energy of Light

Q. Calculate the energy of the violet light emitted by a hydrogen atom with a wavelength of 410.1 nm. A. 4.85x10-19 J B. 2.06x10-19 J C. 8.13x10-19 J ...

Solved • Oct 23, 2020

The Energy of Light

Q. How much energy (in kJ) do 3.0 moles of photons, all with a wavelength of 655 nm, contain?

Solved • Oct 23, 2020

The Energy of Light

Q. Consider a single photon with a wavelength of λ, a frequency of ν, and an energy of E. What is the wavelength, frequency, and energy of a pulse of ...

Solved • Oct 19, 2020

The Energy of Light

Q. Do you expect a strong chemical bond to have a higher or lower frequency than a weak bond?

Solved • Oct 19, 2020

The Energy of Light

Q. Part C. For the wave of light you generated in the Part B, calculate the amount of energy in 1.0 mol of photons with that same frequency (6.8 × 109...

Solved • Jul 2, 2020

The Energy of Light

Q. What is the wavelength λ of the photon that has been released in Part B?The electron from a hydrogen atom drops from an excited state into the grou...

Solved • Jul 2, 2020

The Energy of Light

Q. Part C. Hospital X-ray generators emit X-rays with wavelength of about 15.0 nanometers (nm), where 1 nm = 10-9 m. What is the energy of a photon of...

Solved • Jul 2, 2020

The Energy of Light

Q. Part B. Green light has a frequency of about 6.00 × 1014 s-1. What is the energy of a photon of green light?Express your answer to three significan...

Solved • Jul 2, 2020

The Energy of Light

Q. Part B. Peroxyacyl nitrates contain two relatively weak bonds that can be broken by low-energy photons. The weakest is the N−O bond in the nitrate ...

Solved • Jul 2, 2020

The Energy of Light

Q. Part C. Calculate the energy (in joules) of each photon that is emitted from a patch of ground that is at 27°C. Use the value of λmax of that tempe...

Solved • Jul 2, 2020

The Energy of Light

Q. Part B. Using the visible region of the EM spectrum from the transition as a guide, label each indicated region of the hypothetical flame with the ...

Solved • Jul 2, 2020

The Energy of Light

Q. Part A. Use the PhET simulation to adjust the temperature and examine where λmax occurs for the surface of the Earth, a light bulb, the sun, and Si...

Solved • Jul 2, 2020

The Energy of Light

Q. Part A. Suppose that the microwave radiation has a wavelength of 12 cm. How many photons are required to heat 225 mL of coffee from 25.0°C to 62.0°...

Solved • Jul 2, 2020

The Energy of Light

Q. Part C. What is the longest wavelength λ of light that will provide photons of sufficient energy to break the π bond and cause the isomerization?Ex...

Solved • Jul 2, 2020

The Energy of Light

Q. The emission line used for zinc determinations in atomic emission spectroscopy is 214 nm. If there are 5.50×1010 atoms of zinc emitting light in th...

Solved • Jul 2, 2020

The Energy of Light

Q. A radio wave has a frequency of 8.6 x 108 Hz. What is the energy of one photon of this radiation?

Solved • Apr 30, 2020

The Energy of Light

Q. How much energy is contained in 1 mol of each of the following?1. X-ray photons with a wavelength of 0.135 nm. Express the energy numerically in ki...

Solved • Apr 29, 2020

The Energy of Light

Q. Calculate the energy for one mole of photons (an einstein) for light absorbed at 6.90 x 102 nm.

Solved • Apr 29, 2020

The Energy of Light

Q. Consider a single photon with a wavelength of λ, a frequency of ν, and an energy of E. What is the wavelength, frequency, and energy of a pulse of ...

Solved • Apr 27, 2020

The Energy of Light

Q. How much energy (in kJ) do 3.0 moles of photons, all with a wavelength of 655 nm, contain?

Solved • Apr 20, 2020

The Energy of Light

Q. What are the frequency and energy of a photon with a wavelength of 527 nm?

Solved • Mar 17, 2020

The Energy of Light

Q. A photon of orange light has energy of 3.13 x 10-19 J. What is its wavelength?A. 700 nmB. 635 nmC. 590 nmD. 562 nmE. 494 nm

Solved • Nov 28, 2019

The Energy of Light

Q. Infrared radiation has wavelengths of roughly from 700 nm to 1 mm. If a certain infrared wave has a wavelength of 6,254 nm, what is the energy of o...

Solved • Nov 22, 2019

The Energy of Light

Q. Visible light has wavelengths of roughly from 400 to 700 nm. If a certain color has a wavelength of 476.4 nm, what is the energy of one of its phot...

Solved • Nov 21, 2019

The Energy of Light

Q. My microwave operates at a wavelength of 300.0 mm (note units). What is the energy of a mole of photons generated by this microwave?  The value of ...

Solved • Oct 8, 2019

The Energy of Light

Q. Calculate the energy of a photon in joules if the wavelength is 5.48 x 10 2 nm.

Solved • Sep 18, 2019

The Energy of Light

Q. What is the energy of the green light emitted, per photon, by a mercury lamp with a frequency of 5.49 × 1014 Hz?a. 2.75 × 10-19 Jb. 3.64 × 10-19 Jc...

Solved • Sep 15, 2019

The Energy of Light

Q. Which one of the following occurs as the energy of a photon increases?a. The frequency decreases.b. The speed increases.c. The wavelength gets shor...

Solved • Sep 15, 2019

The Energy of Light

Q. How much energy (in kJ) do 3.00 moles of photons, all with a wavelength of 675 nm, contain?A) 532 kJ B) 177 kJ C) 238 kJ D) 418 kJ E) 354 kJ

Solved • Sep 12, 2019

The Energy of Light

Q. A mole of red photons of wavelength 725 nm has kj of _____.

Solved • Aug 29, 2019

The Energy of Light

Q. Microwave ovens emit microwave energy with a wavelength of 12.2 cm. What is the energy of exactly one photon of this microwave radiation?

Solved • Aug 8, 2019

The Energy of Light

Q. The wavelength of some orange light is 620.0 nm. What is the frequency of this orange light?

Solved • Aug 7, 2019

The Energy of Light

Q. If light has a wavelength of 468 nm, what is the energy of this light expressed with units of kJ/mol?

Solved • Aug 7, 2019

The Energy of Light

Q. What is the energy of a photon of light with a wavelength of 575 nm?

Solved • Aug 7, 2019

The Energy of Light

Q. Calculate the energy of the violet light emitted by a hydrogen atom with a wavelength of 410.1 nm.

Solved • Aug 2, 2019

The Energy of Light

Q. X-ray diffractometers often use metals that have had their core electrons excited as a source of X rays. Consider the 2p → 1s transition for copper...

Solved • Nov 27, 2018

The Energy of Light

Q. The energy from radiation can be used to cause the rupture of chemical bonds. A minimum energy of 242 kJ/mol is required to break the chlorine–chlo...

Solved • Nov 12, 2018

The Energy of Light

Q. Calculate the energy of a photon of electromagnetic radiation whose frequency is 2.86×1014 s-1 .

Solved • Nov 12, 2018

The Energy of Light

Q. One way to measure ionization energies is photoelectron spectroscopy (PES), a technique based on the photoelectric effect. In PES, monochromatic li...

Solved • Nov 12, 2018

The Energy of Light

Q. Carotenoids are yellow, orange, and red pigments synthesized by plants. The observed color of an object is not the color of light it absorbs but ra...

Solved • Nov 12, 2018

The Energy of Light

Q. The watt is the derived SI unit of power, the measure of energy per unit time: 1W = 1J/s. A semiconductor laser in a CD player has an output wavele...

Solved • Nov 12, 2018

The Energy of Light

Q. Calculate the energy of a photon of wavelength 0.154 nm .

Solved • Nov 12, 2018

The Energy of Light

Q. An AM radio station broadcasts at 1030 kHz , and its FM partner broadcasts at 98.4 MHz .Calculate the energy of the photons emitted by the AM radio...

Solved • Nov 12, 2018

The Energy of Light

Q. The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. The change in shape trigger...

Solved • Nov 12, 2018

The Energy of Light

Q. Ultraviolet radiation and radiation of shorter wavelengths can damage biological molecules because these kinds of radiation carry enough energy to ...

Solved • Nov 12, 2018

The Energy of Light

Q. Determine the energy of 1.60 mol of photons for each of the following kinds of light. (Assume three significant figures.)infrared radiation (1510 nm)

Solved • Nov 12, 2018

The Energy of Light

Q. Determine the energy of 1.60 mol of photons for each of the following kinds of light. (Assume three significant figures.)ultraviolet radiation (155...

Solved • Nov 12, 2018

The Energy of Light

Q. Without stratospheric ozone (O3), harmful solar radiation would cause gene alterations. Ozone forms when the bond in O2 breaks and each O atom reac...

Solved • Oct 24, 2018

The Energy of Light

Q. A Blu-ray laser has a power of 5 milliwatts (1 watt = 1 J s−1). How many photons of light are produced by the laser in 1 hour?  (λ = 405nm.)

Solved • Oct 22, 2018

The Energy of Light

Q. The eyes of certain reptiles pass a single visual signal to the brain when the visual receptors are struck by photons of a wavelength of 850 nm. If...

Solved • Oct 22, 2018

The Energy of Light

Q. Photons of infrared radiation are responsible for much of the warmth we feel when holding our hands before a fire. These photons will also warm oth...

Solved • Oct 22, 2018

The Energy of Light

Q. Light with a wavelength of 614.5 nm looks orange. What is the energy, in joules, per photon of this orange light? What is the energy in eV (1 eV = ...

Solved • Oct 22, 2018

The Energy of Light

Q. A bright violet line occurs at 435.8 nm in the emission spectrum of mercury vapor. What amount of energy, in joules, must be released by an electro...

Solved • Oct 22, 2018

The Energy of Light

Q. In fireworks, the heat of the reaction of an oxidizing agent, such as KClO4, with an organic compound excites certain salts, which emit specific co...

Solved • Oct 18, 2018

The Energy of Light

Q. The optic nerve needs a minimum of 2.0 x 10−17 J of energy to trigger a series of impulses that eventually reach the brain. How many photons of blu...

Solved • Oct 18, 2018

The Energy of Light

Q. A lithium flame has a characteristic red color due to emission of light of wavelength 671 nm. What is the mass equivalence of 1 mol photons with th...

Solved • Oct 17, 2018

The Energy of Light

Q. An x-ray has a wavelength of 1.3 Å. Calculate the energy (in J) of one photon of this radiation.

Solved • Oct 17, 2018

The Energy of Light

Q. Cesium was discovered in natural mineral waters in 1860 by R. W. Bunsen and G. R. Kirchhoff, using the spectroscope they invented in 1859. The name...

Solved • Oct 16, 2018

The Energy of Light

Q. X rays have wavelengths on the order of 1 x 10-10 m. Calculate the energy of 1.0 x 10 -10 m X rays in units of kilojoules per mole of X rays. (1 mo...

Solved • Oct 15, 2018

The Energy of Light

Q. Carbon absorbs energy at a wavelength of 150 nm. The total amount of energy emitted by a carbon sample is 1.98 x 105 J. Calculate the number of car...

Solved • Oct 15, 2018

The Energy of Light

Q. A photon of ultraviolet (UV) light possesses enough energy to mutate a strand of human DNA. What is the energy of a single UV photon and 1 mole of ...

Solved • Oct 15, 2018

The Energy of Light

Q. How many photons are produced in a laser pulse of 0.580 J at 637 nm?

Solved • Oct 5, 2018

The Energy of Light

Q. Microwave ovens emit microwave energy with a wavelength of 13.0 cm. What is the energy of exactly one photon of this microwave radiation? 

Solved • Oct 5, 2018

The Energy of Light

Q. Be sure to answer all parts. The blue color of the sky results from the scattering of sunlight by molecules in the air. The blue light has a freque...

Solved • Oct 3, 2018

The Energy of Light

Q. Part AX-ray photons with a wavelength of 0.135 nm. Express the energy numerically in kilojoules per mole. Part Bγ-ray photons with a wavelength of ...

Solved • Sep 19, 2018

The Energy of Light

Q. Be sure to answer all parts.What is the wavelength (in nm) of radiation that has an energy content of 4.35 x 103 kJ/mol? 

Solved • Sep 13, 2018

The Energy of Light

Q. Part A104.1 MHz (typical frequency for FM radio broadcasting) Express your answer in joules using four significant figures. Part B1045 MHz (typical...

Solved • Sep 11, 2018

The Energy of Light

Q. It takes 157 kJ/mol to break a nitrogen-oxygen single bond. Calculate the maximum wavelength of light (nm) for which a nitrogen-oxygen single bond ...

Solved • Sep 11, 2018

The Energy of Light

Q. A certain shade of blue has a frequency of 7.01 x 1014 Hz. What is the energy (J) of exactly one photon of this light?

Solved • Sep 7, 2018

The Energy of Light

Q. Part AThe equation for density, d is d = m/Vwhere m is mass and V is volume. What is the density, d, of a substance with a volume of V = 16.4 cm3 a...

Solved • Sep 6, 2018

The Energy of Light

Q. The energy of a photon of light is given by E = hv. The frequency, v, of light and the wavelength, λ, are related through: v = c/λ where c is the s...

Solved • Aug 13, 2018

The Energy of Light

Q. The energy of light calculated using the formulas below tell you the energy per photon of light. E = h x v E = h x c / λ If light has a wavelength ...

Solved • Aug 13, 2018

The Energy of Light

Q. The power of a red laser (λ = 630 nm) is 2.50 watts (abbreviated W, where 1 W = 1 J/s). How many photons per second does the laser emit?

Solved • Aug 13, 2018

The Energy of Light

Q. Be sure answer all parts.How many photons at 586 nm must be absorbed to melt 5.15 x 10 2 g of ice? (It takes 334 J to melt 1 g of ice at 0°C.) (Ent...

Solved • Aug 9, 2018

The Energy of Light

Q. Be sure to answer all parts.The blue color of the sky results from the scattering of sunlight by molecules in the air. The blue light has a frequen...

Solved • Aug 9, 2018

The Energy of Light

Q. What is the wavelength λ of the photon that has been released with ΔE = -2.05 x 10-18 J? Express your answer with the appropriate units.

Solved • Jul 10, 2018

The Energy of Light

Q. The biological effects of a given dose of electromagnetic energy generally become more serious as the energy of the radiation increases: Infrared r...

Solved • Jul 5, 2018

The Energy of Light

Q. Suppose that the microwave radiation has a wavelength of 12.4 cm. How many photons are required to heat 215 mL of coffee from 25.0 degree C to 62.0...

Solved • May 12, 2018

The Energy of Light

Q. A photon has a wavelength of 759 nm. Calculate the energy of the photon in joules. Enter your answer in scientific notation. 

Solved • May 3, 2018

The Energy of Light

Q. A 1.00 mL ampule of a 0.150 M solution of naphthalene in hexane is excited with a flash of light. The naphthalene emits 19.9 J of energy at an aver...

Solved • Apr 2, 2018

The Energy of Light

Q. The energy of a photon that has a wavelength of 9.0 m is _____ J. a. 2.2 x 10-26 b. 4.5 x 1025 c. 6.0 x 10-23 d. 2.7 x 109 e. 4.5 x 10-25

Solved • Apr 2, 2018

The Energy of Light

Q. Calculate the frequency (Hz) and energy (J/photon) of visible light with a wavelength of 325nm.

Solved • Mar 30, 2018

The Energy of Light

Q. Which of the following occur as the energy of a photon increases?a. The frequency decreases.b. The speed increases.c. The wavelength increases.d. T...

Solved • Mar 23, 2018

The Energy of Light

Q. How much energy is contained in 1 mol of each of the following? a. X-ray photons with a wavelength of 0.135 nm. Express the energy numerically in k...

Solved • Mar 19, 2018

The Energy of Light

Q. Calculate the energy of a photon of electromagnetic radiation at each of the following frequencies. Express your answer using four significant figu...

Solved • Mar 13, 2018

The Energy of Light

Q. The human eye contains a molecule called 11-cis-retinal that changes conformation when struck with light of sufficient energy. The change in confor...

Solved • Feb 26, 2018

The Energy of Light

Q. Ionization involves completely removing an electron from an atom. Light of a particular wavelength can cause ionization to occur if it has the requ...

Solved • Feb 23, 2018

The Energy of Light

Q. Which of the following wavelengths of light has the highest energy?i) 4.0 x 10-4 mii) 3.8 x 10-9 miii) 9.2 x 105 miv) 7.3 x 101 mv) 1.5 x 10-14 m

Solved • Feb 22, 2018

The Energy of Light

Q. How many photons are produced in a laser pulse of 0.528 J at 679 nm? 

Solved • Feb 20, 2018

The Energy of Light

Q. Calculate the energy of a photon of electromagnetic radiation at each of the following frequencies.i) 102.3 mHz (typical frequency for FM radio bro...

Solved • Feb 19, 2018

The Energy of Light

Q. How many photons are contained in a flash of green light (525 nm) that contains 189 kJ of energy?

Solved • Feb 19, 2018

The Energy of Light

Q. Calculate the energy of a photon of electromagnetic radiation at each of the following frequencies (in J).i) 103.7 MHz (typical frequency for FM ra...

Solved • Feb 19, 2018

The Energy of Light

Q. How many photons are contained in a flash of green light (525 nm) that contains 189 kJ of energy?(a) 4.99 x 1023(b) 7.99 x 1030(c) 5.67 x 1023(d) 1...

Solved • Feb 19, 2018

The Energy of Light

Q. Calculate the energy of a photon of electromagnetic radiation at each of the following wavelengths.i) 632.8 nm (wavelength of red light from helium...

Solved • Feb 15, 2018

The Energy of Light

Q. Hospital X-ray generators emit X rays with wavelength of about 15.0 nm, where 1 nm = 10 -9 m. What is the energy of a photon in an X ray? Express a...

Solved • Feb 2, 2018

The Energy of Light

Q. Green light has a frequency of about 6.00 x 10 14 s-1 . What is the energy of a photon of green light?(4 sig. fig)E = J 

Solved • Jan 4, 2018

The Energy of Light

Q. Where h = 6.626 x 10 -34 J s ( Planck's constant ) and c = 2.99 x 10 8 m/s. What is the wavelength of a photon that has an energy of E = 4.13 x 10-...

Solved • Dec 15, 2017

The Energy of Light

Q. The energy of a photon of light is given by E = hv. The frequency, v, of light and the wavelength, λ, are related through: v = c/λ where c is the s...

Solved • Dec 14, 2017

The Energy of Light

Q. What is the wavelength of light if the energy of a photon is 3.65 x 10  -19 J? A) 545 nm B) 5.45 x 10-7 nm C) 1.84 x 106 nm D) 5.51 x 1014 nm ...

Solved • Nov 10, 2017