Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEST2019PhysicsDual Nature of Matter

A spherical copper particle has about 125 atoms. If the atomic radius of copper is 140 pm (1 pm =10⁻¹² ~m ) , the diameter of the particle is close to the wavelength of

Options

  1. Agreen light.
  2. Belectron beam of energy 1.4 eV .
  3. Csound waves of frequency 340 Hz travelling in air at room temperature.
  4. Dx-rays of energy 12.40 keV .

Correct answer

B. electron beam of energy 1.4 eV .

Step-by-step solution

No solution available.

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 NEST PYQs