siwalaxmi siwalaxmi
  • 15-03-2021
  • Physics
contestada

what is principal focus and focus length with examples​

Respuesta :

sevdaretl06
sevdaretl06 sevdaretl06
  • 15-03-2021

Explanation:

Principle focus is the point on the axis of a convex lens, where the parallel rays of light from one side of the lens. meet on other side after refraction. Distance between optical centre to principle focus point is the focal length.

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