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MHT CET 2026 (15 Apr, Shift 1) · Matter Waves: de Broglie Wavelength

Matter Waves: de Broglie Wavelength question from MHT CET 2026 (15 Apr, Shift 1)

Q25MHT CET 2026 · 15 APR · SHIFT 1Difficult

Matter Waves: de Broglie Wavelength

Light of wavelength ' $\lambda$ ' which is less than threshold wavelength is incident on a photosensitive material. If incident wavelength is decreased so that emitted photoelectrons are moving with some velocity then stopping potential

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Answer: (b)

$eV_0 = \dfrac{hc}{\lambda} - \phi$
Decreasing $\lambda$ raises photon energy $hc/\lambda$ , so $K_{max}$ and $V_0$ rise.
So the answer is (b) increases.

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