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Photoelectric Effect and WaveParticle Duality — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsPhotoelectric Effect and WaveParticle Duality1 Mark
Question
Two photons having:
  1. Equal wavelengths have equal linear momenta.
  2. Equal energies have equal linear momenta.
  3. Equal frequencies have equal linear momenta.
  4. Equal linear momenta have equal wavelengths.
✓

Answer

  1. Equal linear momenta have equal wavelengths.

Explanation:

Two photons having equal linear momenta have equal wavelengths is correct. As in the rest of the options magnitude of momentum or energy can be same because energy and momentum are inversely proportional to wavelength. But the direction of propagation of the photons can be different.

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