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ICSE Class 10 Physics Question 3 of 27

Solved 2024 Specimen Paper ICSE Class 10 Physics — Question 14

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14
Question

Question 1(xiv)

When a ray of light enters from a denser medium to a rarer medium then:

  1. the light ray bends towards the normal
  2. the speed of light increases
  3. the angle of incidence is greater than the angle of refraction
  4. its wavelength decreases.
Answer

the speed of light increases

Reason — The speed of light increases when it enters from a denser medium to a rarer medium. Lower density of the rarer medium causes less interaction between photons and particles. This reduces the scattering and results in a higher speed.