Physics · 2020
JEE Main · 3 September 2020, Shift 2 · Q17
Two sources of light emit X-rays of wavelength 1 nm and visible light of wavelength 500 nm, respectively. Both the sources emit light of the same…
Two sources of light emit X-rays of wavelength $\displaystyle 1$ nm and visible light of wavelength $\displaystyle 500$ nm, respectively. Both the sources emit light of the same power $\displaystyle 200$ W . The ratio of the number density of photons of X-rays to the number density of photons of the visible light of the given wavelengths is :
Official answer
(3)
$\displaystyle \frac{1}{500}$
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JEE Main 2020 Physics question, with the answer from NTA’s final answer key. Where our answers come from.