Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
MHT CET202410 May 2024Evening ShiftPhysicsDual Nature of MatterActual

A photoelectric surface is illuminated successively by monochromatic light of 'wavelength ' ' and ( 2 ) . If the maximum kinetic energy of the emitted photoelectrons in the first case is one-fourth that in the second case, the work function of the surface of the material is ( c = speed of light, h = Planck's constant )

Options

  1. A2 hc
  2. Bhc
  3. C2 hc 3
  4. Dhc 3

Correct answer

C. 2 hc 3

Step-by-step solution

aligned & E₁= h c - ...(i) & E₂= h c / 2 - = 2 h c - (ii) & Given, E₁= E₂ 4 & 4 E₁=E₂ ...(iii) & From (ii) and (iii), & 4 E₁= 2 h c - & 4 ( h c - )= 2 h c - aligned [Substituting from (i)] array ll & 4 h c -4 = 2 h c - & 3 = 2 h c & = 2 h c 3 array

Practice Dual Nature of Matter on Quantrex Academy →

More from Dual Nature of Matter

The basic principle used behind the working of electron microscope is: 2026The variation of the stopping potential ( V₀ ) with the frequency of incident radiation(n) is as given below. [ n₀ - threshold frequency. h- Planck's constant e- electronic charge] 2026When metal of work function 1.4eV is exposed to a radiation, the maximum kinetic energy of the electron emitted is 0.4eV. The stopping potential required is: 2026A monochromatic beam of photons of intensity to 1.5 Wm⁻² and energy 11.2 eV is incident on a material of work function 4.8 eV. What is the maximum speed of photoelectrons emitted d 2026What is the ratio of de Broglie wavelength of an electron to that of proton if the velocity of proton is 1 6 the velocity of electron? 2026Consider normal incidence of a monochromatic beam of photons of power P on a flat surface. Of the incident beam, 10% gets absorbed, 10% gets transmitted, and the rest is reflected 2026An experimental study of the photoelectric effect involves a metal of work function ₀ . What is the smallest wavelength of the incident photon to photoemit an electron of mass m wh 2026Work function of the metal is 2026 Full Dual Nature of Matter list All MHT CET PYQs