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A laser beam of output power 'P' consist...

A laser beam of output power 'P' consists only of wavelength `lambda`. If Planck's constant is `h` and the speed of light is `c`, then the number of photons emitted per second is

A

`Plambda//hc`

B

`Plambda//h`

C

`hc//Plambda`

D

`hc//P`

Text Solution

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The correct Answer is:
A
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