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D(3) line observed in the yellow region ...

`D_(3)` line observed in the yellow region of the sun's spectrum is due to

A

sodium

B

Neon

C

Krypton

D

Helium

Text Solution

Verified by Experts

The correct Answer is:
D
Jannesen observed a new bright line in the yellow region of sun's spectrum which do not coincide with two known lines `D_(1)` and `D_(2)` of sodium. He named the new line as `D_(3)`. Frankland and Lockyer pointed out that this was due to helium.
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