3. Using Rayleigh – Jeans formula, find the energy density u, at wavelength 2 = 1 Å at temperature T=500 K, wherek =1.38x1023
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- 3. When a metal is illuminated with light of wavelength 420 nm, the stopping potential is 0.65 V; when the wavelength of incident light is changed to 310 nm, the stopping potential is 1.69 V. Use these given data to find the work function of this metal in eV and a value of Planck's constant h (speed of light = 3 × 10® m/s, electronic charge = -1.6 x 10-19 C).51) A photon of energy 1.24 eV is absorbed by a molecule. a) What is its wavelength in cm and the reciprocal of its wavelength in cm-1? A..........cm B..........cm-1 The molecule transitions to an energy level of 0.24 eV, and emits a photon. b) What is the energy of the emitted photon (eV)? ..........eV c) What is its wavelength in cm and the reciprocal of its wavelength in cm-1? C..........cm D..........cm-1 d) Find D-B in cm-1. ..........cm-1 The second photon of energy 1.14 eV is absorbed by the same molecule. e) What is its wavelength in cm and the reciprocal of its wavelength in cm-1? E..........cm F..........cm-1 The molecule transitions to an energy level of 0.24 eV, and emits a photon. f) What is the energy of the emitted photon (eV)? ..........eV g) What is its wavelength in cm and the reciprocal of its wavelength in cm-1? G..........cm…7) Find the wavelength of the photon as an electron makes a transition from n=4 to n=3. for particle in a box with E1=13.6 eV