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Wavelength of particular transition for ...

Wavelength of particular transition for `H` atom is `400 nm`. What can be wavelength of `He` for same transition ?

A

`400 nm`

B

`100 nm`

C

`1600 nm`

D

`200 nm`

Text Solution

Verified by Experts

The correct Answer is:
B
(b) `(1)/(lamda) = R ((1)/(m^2) -(1)/(n^2)) xx Z^2`
for `lamda_(He) = (400)/(2^2) = (400)/(4) = 100 nm`.
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