Student Login

Home›Chapters›Dual Nature of Radiation and Matter PYQs›Photoelectric Effect: Einstein's Equation›Question 25

MHT CET 2026 (17 Apr, Shift 1) · Photoelectric Effect: Einstein's Equation

Photoelectric Effect: Einstein's Equation question from MHT CET 2026 (17 Apr, Shift 1)

Q25MHT CET 2026 · 17 APR · SHIFT 1Medium

Photoelectric Effect: Einstein's Equation

Photoelectric emission is observed from a metallic surface for frequencies $\nu_1$ and $\nu_2$ of the incident light rays ( $\nu_1 > \nu_2$ ). If the ratio of maximum value of kinetic energy of the photoelectron emitted in first case to that in second case 3: K, then the threshold frequency of the metallic surface is

Show answer and solution

Answer: (d)

$K = h(\nu - \nu_0)$ , so $\frac{K_1}{K_2} = \frac{\nu_1 - \nu_0}{\nu_2 - \nu_0} = \frac{3}{K}$ .
$K\nu_1 - K\nu_0 = 3\nu_2 - 3\nu_0$
$\nu_0(K - 3) = K\nu_1 - 3\nu_2$
So the answer is (d) $\nu_0 = \frac{K\nu_1 - 3\nu_2}{K - 3}$ .

Report a mistake

More questions on Photoelectric Effect: Einstein's Equation

Photoelectrons are emitted from two similar metal plates when wavelengths λ₁ and λ₂ are…MHT CET 2026 (11 Apr, Shift 2)
Photoelectric emission is observed from a metallic surface for frequencies v₁ and v₂ of…MHT CET 2026 (11 Apr, Shift 1)
K₁ and K₂ be the maximum kinetic energies of photoelectrons emitted from a surface of a…JEE Main 2026 (8 Apr, Shift 2)
A photon of energy 10 units ejects a photo-electron from a metal surface whose work…MHT CET 2026 (12 May, Shift 1)
Sodium and copper have work functions 2.3 eV and 4.5 eV respectively. The ratio of…MHT CET 2025 (25 Apr, Shift 1)
Light of wavelength ' λ ' falls on a metal having work function (hc)/(λ₀). Photoelectric…MHT CET 2025 (20 Apr, Shift 1)
The work function of a metal is 3 eV. The color of the visible light that is required to…JEE Main 2025 (3 Apr, Shift 1)
The work functions of cesium (Cs) and lithium (Li) metals are 1.9 eV and 2.5 eV…JEE Main 2025 (22 Jan, Shift 1)