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Refraction of Light at Plane Surfaces — Physics STD 10 — Question

ICSE BoardEnglish MediumSTD 10PhysicsRefraction of Light at Plane Surfaces1 Mark
MCQ
Identify the incorrect statement:
  • ✓
    When light refracts from a denser to a rarer medium, its speed decreases.
  • B
    The frequency of light remains unchanged during refraction.
  • C
    The speed of light in a medium is related to its wavelength and frequency as $V = f \lambda$.
  • D
    The incident ray, refracted ray, and normal at the point of incidence lie in the same plane.
✓

Answer

Correct option: A.
When light refracts from a denser to a rarer medium, its speed decreases.
(a)
When light refracts from a denser to a rarer medium, its speed decreases.
Explanation:
When light refracts from a denser to a rarer medium, its speed increases due to the change in refractive index..

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