If an electron undergoes transition from 4th to 2nd orbit, then the color of radiations produced will be:
Correct answer: B. Blue-green
- A. Violet
- B. Blue-green
- C. Ultraviolet
- D. Infrared
Explanation
Transition is to 2nd orbit which means we have to use the formula for Balmer series which is: 1/λ = RH (1/22 - 1/n2)For 4th orbit: 1/λ = RH (1/22 - 1/42)So, wavelength comes out to be: λ = 485.99nmWe know that this is the wavelength of blue green light. Therefore, Blue-green radiations will be emitted. Here is the complete spectrum:
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