We’re being asked to determine what will happen if the same metal is irradiated with a 5W green laser pointer.
We need to determine the number of photons emitted by the 11-W red laser pointer and compare the number of photons emitted by the 5-W green laser pointer
Recall that the energy of a photon (E) is given by:
h = Planck’s constant (6.626 × 10–34 J • s)
v = frequency (in s–1)
Also, recall that the frequency (v) and wavelength (λ) are related:
c = speed of light (3.0 × 108 m/s)
If electrons are ejected from a given metal when irradiated with a 11-W red laser pointer, what will happen when the same metal is irradiated with a 5-W green laser pointer?
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