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A 50 watt bulb emits monochromatic red l...

A 50 watt bulb emits monochromatic red light of wavelength of 795 nm. The number of photons emitted per second by the bulb is `x xx 10^20`. The value of x is _______.
(Nearest integer)
[Given : `h = 6.63 xx 10^(-34) Js and c = 3.0 xx 10^8 ms^(-1)`]

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