Human skin is relatively insensitive to visible light, but ultraviolet radiation can cause severe burns. Does this have anything to do with photon energies? Explain.
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Human skin is relatively insensitive to visible light, but ultraviolet
radiation can cause severe burns. Does this have anything to do with
photon energies? Explain.
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- MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A solid metal sphere emits 1.62 x 1020 photons every second with a radiating power of 1.93 W. (a) Determine the energy associated with each photon. eV (b) Assuming the sphere's power output is associated with the peak wavelength, determine the temperature of the sphere at which this wavelength is emitted. K Additional Materials O ReadingTOPIC: LIGHT ABSORBED AS PHOTONS: PHOTOELECTRIC EFFECT. INSTRUCTIONS: ANSWERS THE PROBLEM. CHOOSE THE ANSWER FROM [ (i),(ii),(iii)...] and provide explanation/solutions.1) The Sun cranks out about 4 x 1026 J/s, i.e. its radiant power pe = 4 x 10²6 W. For a square meter of area here on the Earth whose surface normal points directly to the Sun, how many watts are received? How many 550-nm photons would that correspond to? (The Earth-Sun distance is about 150x100 km.)
- Tantalum has a work function of 4.2 eV. The most energetic photoelectron has KE of 2.12 eV. What is the wavelength of the incoming photons? a) 586 nm b) 197 nm c) 296 nm d) none of these.A metal has a work function of 3.1eV and is illuminated by light of wavelength A = 320 nm. What is the maximum velocity of the photoelectrons emitted? Select one: а. 2.7 x 106 m/s b. 3.2 x 10' m/s С. 5.9 x 105 m/s O d. 5.24 x 105 m/shelp