A photon of blue light and a photon of red light are traveling in vacuum. The photon of blue light
A) has a smaller wavelength than a photon of red light and travels with the same speed.
B) has a smaller wavelength than a photon of red light and travels with a greater speed.
C) has a longer wavelength than a photon of red light and travels with the same speed.
D) has a longer wavelength than a photon of red light and travels with a greater speed.
Question 2
An electron in an infinite potential well (a box) makes a transition from the n = 3 level to the ground state and in so doing emits a photon of wavelength 20.9 nm
. (c = 3.00 108 m/s, h = 6.626 10-34J s, mel = 9.11 10-31 kg)
(a) What is the width of this well?
(b) What wavelength photon would be required to excite the electron from its original level to the next higher one?
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