A photon of 300 nm is absorbed by a gas...

A photon of ` 300 nm` is absorbed by a gas and then re-emits two photons . One re-emitted photon has wavelenght ` 4967 nm`, the wavelength of second re-emitted photon is :

A

450 nm

B

800 nm

C

200 nm

D

750 nm

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