Monochromatic light of frequency `6.0xx10^(14)Hz` is produced by a laser. The power emitted is `2.0xx10^-3W`, (a) What is the energy of a photon in the light beam? (b) How many photons per second, on the average, are emitted by the source? Given `h=6.63xx10^(-34) Js`

Monochromatic light of frequency `6.0xx10^(14)Hz` is produced by a las

1.	Monochromatic light of frequency `6.0xx10^(14)Hz` is produced by a laser. The power emitted is `2.0xx10^-3W`, (a) What is the energy of a photon in the light beam? (b) How many photons per second, on the average, are emitted by the source? Given `h=6.63xx10^(-34) Js`
Answer» (i) Energy of one photon `=hv=6.63xx10^(-34)xx6.0xx10^(14)=39.79xx10^(-20)J` (ii) No. of photons per sec . `=("Total Energy/sec")/("Energy of onephoton")=(2.0xx10^(-3))/(39.78xx10^(-20))=5.0276xx10^(15)`Photons per sec.

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Monochromatic light of frequency `6.0xx10^(14)Hz` is produced by a laser. The power emitted is `2.0xx10^-3W`, (a) What is the energy of a photon in the light beam? (b) How many photons per second, on the average, are emitted by the source? Given `h=6.63xx10^(-34) Js`

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