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Wave Optics — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsWave Optics1 Mark
MCQ
Why do polarized sun glasses block out some reflected light $($glare$)$, but do not block out light that has not been reflected?
  • ✓
    Some reflected light is at least partially polarized.
  • B
    Some reflected light changes frequency.
  • C
    Some reflected light is at least partially diffracted.
  • D
    Some reflected light splits into multiple photons.
✓

Answer

Correct option: A.
Some reflected light is at least partially polarized.

When ordinary $($unpolarised$)$ light is reflected from a surface, it gets partial polarisation, it means some of the electric vectors in some planes are cut$-$off. When this partially polarized light is incident on polarized glasses, glass acts as an analyser and therefore block out some reflected light.

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