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light-reflection and refraction — Science STD 10 — Question

Gujarat BoardEnglish MediumSTD 10Sciencelight-reflection and refraction3 Marks
Question
Write the laws of reflection of light.
✓

Answer

  • The laws of reflection of light are as follows:
  • $(1)$ The angle of incidence is equal to the angle of reflection, i.e., $i = r$.
  • $(2)$ The incident ray, the normal to the mirror at the point of incidence and the reflected ray, all lie in the same plane.
  • Important notes:
  • $(i)$ These laws of reflection are applicable to all the types of reflecting surfaces including spherical surfaces.
  • $(ii)$ Moreover, these laws can also be applied to both regular as well as irregular reflection.
  • $(iii)$ A ray of light which is incident normally on a mirror is reflected back along its own path, i.e., $i = r = 0$.
  • $(iv)$ Silver metal is one of the best reflectors of light.

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