Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
AP EAMCET2015PhysicsDual Nature of Matter

Light with an energy flux of 9 Wcm ⁻² falls on a nonreflecting surface at normal incidence. If the surface has an area of 20 ~cm ^2 . The total momentum delivered for complete absorption in one hour is

Options

  1. A2.16 10⁻⁴ kgms ⁻¹
  2. B1.16 10⁻³ kgms ⁻¹
  3. C2.16 10⁻³ kgms ⁻¹
  4. D3.16 10⁻⁴ kgms ⁻¹

Correct answer

C. 2.16 10⁻³ kgms ⁻¹

Step-by-step solution

We have total momentum as p= ( I A c ) t for non reflecting surface, aligned & p= ( 9 10^4 20 10⁻⁴ 3 10^8 3600 ) & =216 10⁻³ kgms ⁻¹ aligned

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 AP EAMCET PYQs