The number of photons falling per second on a completely darkened plate to produce a force of 6.62\times10^{-5} N is 'n'. If the wavelength of the light falling is 5\times10^{-7} m, then n = _____ \times10^22. (h=6.62\times10^{-34}) Js

KCET 2018 Physics Solved Paper

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The number of photons falling per second on a completely darkened plate to produce a force of 6.62×10−5 N is 'n'. If the wavelength of the light falling is 5×10−7 m, then n = _____ ×1022.
(h=6.62×10−34) Js

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