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Ray Optics and Optical Instruments — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsRay Optics and Optical Instruments1 Mark
MCQ
In image formation from spherical mirrors, only paraxial rays are considered because they:
  • A
    Are easy to handle geometrically.
  • B
    Contain most of the intensity of the incident light.
  • ✓
    Form nearly a point image of a point source.
  • D
    Show minimum dispersion effect.
✓

Answer

Correct option: C.
Form nearly a point image of a point source.

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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