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Physics Mcqs

A photon is________________?

  • (A)  A unit of energy
  • (B)  A positively charged particle
  • (C)  A quantum of electromagnetic radiation
  • (D)  A unit of wavelength
Submitted By :Ali Uppal


Davison Germer experiment indicates__________________?

  • (A)  Interference
  • (B)  Polarization
  • (C)  Electron diffraction
  • (D)  Refraction
Submitted By :Ali Uppal


In Compton scattering, the change in wavelength is maxed if_______________?

  • (A)  The angle of scattering is 90°
  • (B)  The angle of scattering is 60°
  • (C)  The angle of scattering is 180°
  • (D)  The angle of scattering is 0
Submitted By :Ali Uppal


The name of the photon for quantum of light was proposed by________________?

  • (A)  Ampere
  • (B)  Plank
  • (C)  Thomson
  • (D)  Einstein
Submitted By :Ali Uppal


As the temperature of black body is raised the wavelength corresponding to maximum intensity________________?

  • (A)  shifts towards longer wavelength
  • (B)  shifts towards shorter wavelength
  • (C)  remain the same
  • (D)  shifts towards longer as well as shorter wavelengths
Submitted By :Ali Uppal


Einstein’s photoelectric equation is given by_______________?

  • (A)  1/2 mvmax2=hf+Φ
  • (B)  1/2 mvmax2-hf = Φ
  • (C)  1/2 mvmax2=hf-Φ
  • (D)  All of above are correct
Submitted By :Ali Uppal


Rest mass of a photon is________________?

  • (A)  infinite
  • (B)  zero
  • (C)  very small
  • (D)  1.67 x 10-27 kg
Submitted By :Ali Uppal


In the electron microscope, electric & magnetic fields are used as_______________?

  • (A)  Electromagnetic gun
  • (B)  Source of electromagnetic waves
  • (C)  Deflecting charged particle
  • (D)  Converging source of electrons
Submitted By :Ali Uppal


In an electron microscope, we use energetic particles because of______________?

  • (A)  Penetrating power is high
  • (B)  Kinetic energy is large
  • (C)  Wavelength is very short
  • (D)  All the above reasons
Submitted By :Ali Uppal


If a diffraction grating is placed in the path of a light beam it reveals______________?

  • (A)  Wave property
  • (B)  Particle property
  • (C)  Energy particle
  • (D)  Electromagnetic wave property
Submitted By :Ali Uppal