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20 solutions

Photoelectric Effect

Q. A thallium surface emits electrons after shining with a light source of frequency of 4.24×1023 Hz. Calculate the maximum kinetic energy of the ejected electron if the work function of thallium is 6.88×10-19 J.

Solved • Nov 23, 2019

Photoelectric Effect

Q. Electromagnetic radiation of 1.78×1020 Hz frequency is applied on a metal surface and caused electron emission. Determine the work function of the metal if the maximum kinetic energy (Ek) of the emitted elecron is 5.20×10-15 J.

Solved • Nov 22, 2019

Photoelectric Effect

Q. Green plants absorb sunlight to power photosynthesis, the chemical synthesis of food from water and carbon dioxide. The compound responsible for light absorption and color of plants, chlorophyll, strongly absorbs light with a wavelength of 430.nm. Calculate the frequency of this light. Be sure your answer has the correct number of significant digits.

Solved • Nov 22, 2019

Photoelectric Effect

Q. The work function of indium is 4.09 eV. What is the minimum frequency of a photon that will eject an electron from the indium metal surface? 9.88×1014 Hz 1.90×1014 Hz 1.36×10-8 Hz 1.85×1042 Hz 2.06×1025 Hz

Solved • Nov 21, 2019

Photoelectric Effect

Q. The work function of indium is 4.09 eV. What is the minimum frequency of a photon that will eject an electron from the indium metal surface?

Solved • Nov 19, 2019

Photoelectric Effect

Q. Scientists are studying ways to improve the efficiency of solar cells by studying a process called photon upconversion. In this process, the energy of two photons can become combined to form a new photon with an energy equal to the sum of the two combined photons. With this process, abundant infrared radiation can be converted into visible light that can be used by solar cells to produce electricity. Suppose an infrared photon with a wavelength of 853 nm were combined with another infrared photon with a wavelength of 915 nm, what would be the wavelength of the new 'combined' photon?

Solved • Oct 19, 2019

Photoelectric Effect

Q. Cesium metal is frequently used in photoelectric cells because the amount of energy necessary to eject electrons from a cesium surface is relatively small-only 206.5 kJ/mol. What wavelength of light (in nanometers) does this correspond to?

Solved • Oct 9, 2019