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Monochromatic light of frequency 6.0xx10...

Monochromatic light of frequency `6.0xx10^(14)` Hz is produced by a laser. The power emitted is `2.0 xx10^(-3)` W(a) What is the energy of a photon in the light beam ? (b ) How many photons per second , on an average , are emitted by the source ?

Text Solution

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The correct Answer is:
(a) `3.98xx10^(-19)J` (b) `5xx10^(15)`
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