JEE Main 2026 — Dual Nature of Matter Question with Solution
JEE Main 2026 (08 April Shift 2)
Question
and be the maximum kinetic energies of photoelectrons emitted from a surface of a given material for the light of wavelength and , respectively. If then the work function of material is given by:
Choose an option
Show full solutionCorrect option: D
Correct answer
D
Step-by-step explanation
Using Einstein's photoelectric equation:
Given , the first equation becomes:
Multiplying by :
Substituting from the second equation:
Answer:
Given , the first equation becomes:
Multiplying by :
Substituting from the second equation:
Answer:
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This is a previous-year question from JEE Main 2026, covering the Dual Nature of Matter chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.