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QNEET-2022-Ph-438: NEET 2022 Physics - Class 12 NEET-2022-Ph-438 Solution: When two monochromatic lights of frequency \( \) and \(2 \) are …
When two monochromatic lights of frequency and are incident on a photoelectric metal their stopping potential becomes and respectively. The threshold frequency for this metal is
Multiple Choice Options
- A 2v
- B 3v
- C 3 2 _ v
- D 2 3 _ v
Step-by-Step Verified Solution
Since k max = e V s = h v _ _
e V s 2 = h v _ h v 0 ....... (i)
e V s = h v 2 _ h v 0 ...... (ii)
1 2 [ h v 2 _ h v 0 ] = h v _ h v 0
_ h v 0 _ h v 0 2 = h v _ h v 4
_ h v 0 2 = 3 h v 4
v 0 = 3 v 2
* Language of question is wrongly framed. The values of stopping potentials should be interchanged.