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31 solutions

The Particle Nature of Light

Q. During photosynthesis, chlorophyll-a absorbs light of wavelength 440nm and emits light of wavelength 670nm. What is the energy available for photosynthesis from the absorption-emission of a mole of photon?

Solved • Aug 15, 2019

The Particle Nature of Light

Q. Excited lithium ions emit radiation at a wavelength of 670.8nm in the visible range of the spectrum. (This characteristic color is often used as a qualitative analysis test for the presence of Li+) Calculate the frequency and the energy of a photon of this radiation

Solved • Aug 13, 2019

The Particle Nature of Light

Q. Most of the ultraviolet radiation reaching the surface of the earth is UV-A radiation, which has a wavelength range of 315 nm to 400 nm. UV-A radiation is a cause of skin aging and also contributes to development of skin cancer. Determine the energy of a mole of photons of UV-A radiation that have a wavelength of 325 nm.

Solved • Jul 3, 2019

The Particle Nature of Light

Q. A few different types of electromagnetic radiation are listed in the table below. Complete the table by ordering these types of radiation by increasing frequency, wavelength, and energy per photon. For example, select "I" in the second column for the type of radiation with the lowest frequency, "2" for the type of radiation with the next higher frequency, and so forth.

Solved • Jun 29, 2019

The Particle Nature of Light

Q. A mole of red photons of wavelength 725 nm has __________ kJ of energy.

Solved • Jun 19, 2019

The Particle Nature of Light

Q. Determine the energy of 1.90 mol of photons for each kind of light. (Assume three significant figures.) visible light (500 nm )

Solved • Jun 13, 2019

The Particle Nature of Light

Q. Determine the energy of 1.90 mol of photons for each kind of light. (Assume three significant figures.) ultraviolet radiation (140 nm )

Solved • Jun 13, 2019