Question:medium
Work functions of four metals M$_1$, M$_2$, M$_3$ and M$_4$ are 4.8, 4.3, 4.75 and 3.75 eV respectively. The metals which do not show photoelectric effect when light of wavelength 310 nm falls on the metals are
Work functions of four metals M$_1$, M$_2$, M$_3$ and M$_4$ are 4.8, 4.3, 4.75 and 3.75 eV respectively. The metals which do not show photoelectric effect when light of wavelength 310 nm falls on the metals are
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The condition for the photoelectric effect is that the incident photon's energy must be greater than the metal's work function ($E_{photon} \ge \phi$). Use the formula $E(\text{eV}) = 1240/\lambda(\text{nm})$ for quick energy calculations.
Updated On: Mar 30, 2026
- M$_1$, M$_2$ only
- M$_1$, M$_3$ only
- M$_1$, M$_2$, M$_3$ only
- M$_1$, M$_2$, M$_4$ only
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The Correct Option is B
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