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JEE MAIN 2021
27.08.21_S2
Question
The number of photons emitted by a monochromatic (single frequency) infrared range finder of power 1 mW and wavelength of 1000 nm , in 0.1 second is $x \times 10^{13}$. The value of $x$ is $\_\_\_\_$ . (Nearest integer) $\left(\mathrm{h}=6.63 \times 10^{-34} \mathrm{Js}, \mathrm{c}=3.00 \times 10^8 \mathrm{~ms}^{-1}\right)$
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JEE Main
Chemistry
Easy
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