Chemistry - Atomic Structure Question with Solution | TestHub

A $50$ watt bulb emits monochromatic red light of wavelength of $795 \mathrm{nm}$. The number of photons emitted per second by the bulb is $x\times {10}^{20}.$ The value of $x$ is _____ .

(Nearest integer)

$\text{ [Given : }\left.\mathrm{h}=6.63\times {10}^{-34}\mathrm{Js}\text{ and} c=3.0\times {10}^8{ \mathrm{ms}}^{-1}\right]$