# A gas absorbs a photon of 355 nm and emits at two wavelengths. If one of the emission is at 680 nm, the other is at - i) 1035 nm ii) 325 nm iii) 743 nm iv) 518 nm?

##### 1 Answer

May 22, 2017

#### Answer:

iii)

#### Explanation:

From Law of Conservation of energy, energy of absorbed photon must be equal to combined energy of two emitted photons.

#E_T = E_1+ E_2# .....(1)

where#E_1# is Energy of first emitted photon emitted and#E_2# is Energy of second emitted photon.

Energy

#E = (hc)/λ# .....(2)

where#h# is Planck's constant,#c# is velocity of light.

Inserting values from (2) in (1) we get

Substituting given values in (3) we get