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Calculate no. of photons emitted by 60W ...

Calculate no. of photons emitted by `60W` bulb in `10` hours that produces light of wavelength `6.626 Å`

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`E = nhv = nhc//lambda implies 60xx10xx60xx60 = nxx(6.626xx10^(-34)xx3xx10^(8))/(6626xx10^(-10))implies n=72xx10^(23)`
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