What is the wavelength of the light emitted when an electron in a hydrogen atom undergoes transition from the energy level n = 4 to energy level n = 2?

Reblausvtct

Reblausvtct

Answered question

2023-02-24

What is the wavelength of the light emitted when an electron in a hydrogen atom undergoes transition from the energy level n = 4 to energy level n = 2? What is the colour corresponding to their wavelengths? (Given R H = 109677 c m 1 )
A) 486 nm, Blue
B) 576 nm, Blue
C) 650, Blue
D) 450 nm, Blue

Answer & Explanation

Dax Downs

Dax Downs

Beginner2023-02-25Added 7 answers

The correct answer is A) 486 nm, Blue
According to Balmer equation,
Wave number ( v ¯ ) = R H [ 1 n 1 2 1 n 2 2 ] c m 1
Substituting all the values, we get
v ¯ = 109677 [ 1 ( 2 ) 2 1 ( 4 ) 2 ] c m 1 = 109677 × 3 16 c m 1
Or λ = 1 v ¯ = 16 109677 × 3 c m = 486 n m
The wavelength corresponds to blue color.

Do you have a similar question?

Recalculate according to your conditions!

New Questions in Electromagnetism

Ask your question.
Get an expert answer.

Let our experts help you. Answer in as fast as 15 minutes.

Didn't find what you were looking for?