Questions
A photon of wavelength 6630 Å is incident on a totally reflecting surface. The momentum delivered by the photon is equal to
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a
6.63 x 10–27 kg-m/sec
b
2 x 10–27 kg-m/sec
c
10–27 kg-m/sec
d
None of these
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Correct option is B
The momentum of the incident radiation is given as . When the light is totally reflected normal to the surface the direction of the ray is reversed. That means it reverses the direction of it’s momentum without changing it’s magnitudeSimilar Questions
An electron is orbiting in 4th energy state in a hydrogen atom. The de-Broglie wavelength associated with this electron is nearly equal to
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