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Physics · 2026 · 1 mark
CBSE 2026 · Region 4 · Set 1 · Q8
While studying photoelectric emission from a given surface, the wavelength of the incident radiation is changed from 600 nm to 400 nm, keeping the…
While studying photoelectric emission from a given surface, the wavelength of the incident radiation is changed from $\displaystyle 600$ nm to $\displaystyle 400$ nm , keeping the intensity of radiation the same. Then :
Official answer
(B)
cut-off potential will increase.
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CBSE Class 12 Physics past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.