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Monochromatic light of wavelength 3000 A...

Monochromatic light of wavelength `3000 A ` is incident normally on a surface of area `4 cm^(2)`. If the intensity of the light is `5xx10^(-2)W//m^(2)`, determine the rate at which photons strike the surface

Text Solution

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Rate at which photons strike the surface
`=(IA)/(hc//lambda)=(6xx10^(-5)J//s)/(6.63xx10^(-19)J//"photon")=9.05xx10^(13)"photon"//s`.
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