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Geometrical Optics — Physics STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 SciencePhysicsGeometrical Optics1 Mark
Question
In image formation from spherical mirrors, only paraxial rays are considered because they:
  1. Are easy to handle geometrically.
  2. Contain most of the intensity of the incident light.
  3. Form nearly a point image of a point source.
  4. Show minimum dispersion effect.
✓

Answer

  1. Form nearly a point image of a point source.

Explanation:

In Image formation from spherical mirrors, only paraxial rays are considered because they form nearly a point Image of a point source. Angle of Incidence of Paraxial rays is very small.

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