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Q.

A photon of 300 nm is absorbed by a gas and then, it re-emits two photons and attains the same initial energy level. One re-emitted photon has wavelength 500 nm. Calculate the wavelength of other photon remitted out :

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a

450 nm

b

800 nm

c

200 nm

d

750 nm

answer is D.

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Detailed Solution

hcλ=hcλ1+hcλ21300=1500+1λ2λ2=300×500200=750
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A photon of 300 nm is absorbed by a gas and then, it re-emits two photons and attains the same initial energy level. One re-emitted photon has wavelength 500 nm. Calculate the wavelength of other photon remitted out :