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Let E=(-1me^(4))/(8epsilon(0)^(2)n^(2)h^...

Let `E=(-1me^(4))/(8epsilon_(0)^(2)n^(2)h^(2))` be the energy of the `n^(th)` level of H-atom state and radiation of frequency `(E_(2)-E_(1))//h` falls on it ,

A

it will not be absorbed at all

B

some of atoms will move to the first excited state.

C

all atoms will be excited to the n = 2 state.

D

no atoms will make a transition to the n = 3 state.

Text Solution

Verified by Experts

The correct Answer is:
b,d
When all the H-atoms are in ground state (n = 1), the radiation of frequency `(E_2-E_1)`,h falling on it may get absorbed by some of the atoms and they get excited to the first excited state (n = 2). Although, none of the atoms will be excited to the second excited state (n = 3).
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