Question:
The photoelectric threshold of a metal is
2000. The energy of electrons ejected from the surface by ultraviolet light of wavelength 1500 is
The photoelectric threshold of a metal is
2000. The energy of electrons ejected from the surface by ultraviolet light of wavelength 1500 is
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Kinetic energy depends on difference of reciprocals of wavelengths.
Updated On: Mar 18, 2026
- 2.0 eV
- 1.5 eV
- 15 eV
- 150 eV
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The Correct Option is A
Solution and Explanation
Step 1: E=(hc)/(λ)
Step 2: Ek=h c((1)/(λ)-(1)/(₀))
Step 3: Substitution gives Ek≈2.0eV.
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