Question

For a certain atom when the system moves from 2E level to E, a photon of wavelength `lambda` is emitted. The wavelength of photon produced during its transition from `(4"E")/3` level to E is ____________.

विकल्प

• `lambda/3`

• `(3lambda)/4`

• `(4lambda)/3`

• `3lambda`

Answer 1

For a certain atom when the system moves from 2E level to E, a photon of wavelength `lambda` is emitted. The wavelength of photon produced during its transition from `(4"E")/3` level to E is `3lambda`.

Explanation:

In the first case, energy emitted,

E₁ = 2E - E = E

In the second case, energy emitted

`"E"_2 = (4"E")/3 - "E" = "E"/3`

`"As E"_3  "is" (1/3) ^"rd", lambda_2  "must be 3 times, i.e.,"  3lambda `