AP EAMCET · PHYSICS · Dual Nature of Matter
The surface of a metal is first illuminated with a light of wavelength 300 nm and later illuminated by another light of wavelength 500 nm . It is observed that the ratio of maximum velocities of photo electrons in two cases is 3. The work function of metal value is close to
- A 6.48 eV
- B 1.23 eV
- C 4.17 eV
- D 2.28 eV
Answer & Solution
Correct Answer
(D) 2.28 eV
Step-by-step Solution
Detailed explanation
\(\lambda_1=300 \mathrm{~nm}, \lambda_2=500 \mathrm{~nm}, \frac{\mathrm{v}_1}{\mathrm{v}_2}=3\) By Einstein photoelectric equation, \(\mathrm{E}=\phi_0+\frac{1}{2} \mathrm{mv}^2\)…
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