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:

Question

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:, 1 500, 250, 1 250, 500

MARKS App · Accepted Answer

P s - Power of source P s = n hc λ ; n = no. of photons emitted/s ⇒ n ∝ λ ⇒ n 2 n 1 = 1 / 500

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