AP EAMCET · PHYSICS · Dual Nature of Matter
In a photoelectric experiment light of wavelength produces photoelectrons with the smallest de Broglie wavelength of . Then the work function of the metal used in the experiment is nearly
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- B
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- D
Answer & Solution
Correct Answer
(A)
Step-by-step Solution
Detailed explanation
Kinetic energy of the electron having de Broglie wavelength λ can be written as, λb=hp=h2mK⇒K=h22mλb2 For the given values, we can write: hcλ=K+ϕ⇒hc800×10-9=h22m×1×10-92+ϕ⇒ϕ=hc800×10-9-h22m×1×10-92…
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