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Physics · 2026 · 1 mark
CBSE 2026 · Region 4 · Set 1 · Q9
Radiation of wavelength 331 nm irradiates the following metals: Which of the following statements is correct?
Radiation of wavelength $\displaystyle 331$ nm irradiates the following metals :
Which of the following statements is correct ?
| Metal | Work Function (eV) |
| Na | $\displaystyle 1.92$ |
| K | $\displaystyle 2 \cdot 15$ |
| Ca | $\displaystyle 3 \cdot 20$ |
| Mo | $\displaystyle 4.17$ |
Official answer
(B)
Only Mo will not show photoelectric emission.
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