Physics · 2023
JEE Main · 29 January 2023, Shift 1 · Q18
The threshold wavelength for photoelectric emission from a material is 5500. Photoelectrons will be emitted, when this material is illuminated with…
The threshold wavelength for photoelectric emission from a material is $\displaystyle 5500 \AA$. Photoelectrons will be emitted, when this material is illuminated with monochromatic radiation from a
A. $\displaystyle 75$ W infra-red lamp
B. $\displaystyle 10$ W infra-red lamp
C. $\displaystyle 75$ W ultra-violet lamp
D. $\displaystyle 10$ W ultra-violet lamp
Choose the correct answer from the options given below:
Official answer
From NTA’s final answer key for this paper.
(4)
C and D only
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JEE Main 2023 Physics question, with the answer from NTA’s final answer key. Where our answers come from.