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PhysicsModern PhysicsX-raysMedium2 minPYQ_2020

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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 power 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:

Options:

Answer:

Solution:

$P_{s} -$ Power of source

$P_{s} = n \frac{hc}{λ}; n$ = no. of photons emitted/s

$\Rightarrow n \propto λ \Rightarrow \frac{n_{2}}{n_{1}} = 1 / 500$

Stream:JEESubject:PhysicsTopic:Modern PhysicsSubtopic:X-rays

⏱ 2mℹ️ Source: PYQ_2020

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