Sodium has a work function of 2.28 eV. If a sodium bar is illuminated with blue...

Question

Question

Sodium has a work function of 2.28 eV. If a sodium bar is illuminated with blue light (450 nm) -

(a) find the max KE (in eV) of a single photoelectron

(b) find the cutoff wavelength and color of a photoelectron. (hint: to find the cutoff wavelength, you should find the max wavelength of the photon.)

science physics

Answer 1

Answer #1

2.28 ev; 450nm @ Mare Kinetic Energy kEman= hf o - he = 1240 ex.nm 450nm = hely-o = 1240 evinm - (2.28 ev) 450 nm 0.475 ev Cu

Answer 2

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