In which of the following transition the wavelength be minimum ? a)n=5 to n=4 b)n=4 to n=3 c)n=3 to n=2 d)n=2 to n=1
Asked by akshadevdm2020
22nd May 2021,
3:43 PM
Answered by Expert
Answer:
Wavelength 
of spectral line that arises due to transition from orbital quantum number m to orbital quantum number n is given as
of spectral line that arises due to transition from orbital quantum number m to orbital quantum number n is given as
where R is Rydberg constant .
Reciprocal of wavelength for all the transitions are tabulated below
| Transition | Eqn. for (1/λ) | 1/λ |
| n=5 to n=4 |
 |
R × 0.0225 |
| n = 4 to n = 3 |
 |
R × 0.0486 |
| n = 3 to n = 2 |
 |
R × 0.1389 |
| n = 2 to n = 1 |
 |
R × 0.5 |
From above table , it can be seen that for the transition from n=2 to n=1 , Reciprocal of wavelength is maximum.
Hence wavelength is minimum for transition from n=2 to n=1
Answered by Expert
22nd May 2021,
4:56 PM
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