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प्रश्न
Explain the following term related to spherical lenses:- principal focus
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उत्तर
Principal Focus:-
The convex lens converge the rays incident on it after refraction, to a point on the principal axis. This point is known as principal focus of the convex lens. The rays incident on concave lens appear to diverge from a point on the principal axis. This point is known as the principal focus of concave lens.
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संबंधित प्रश्न
Name the spherical mirror which has:
(a) virtual principal focus.
(b) real principal focus.
State the direction of incident ray which after reflection from a spherical mirror gets reflected along its own path. Give a reason.
How is the focal length of a spherical mirror related to its radius
Choose the correct alternative and rewrite the following:
Mirror used by a dental surgeon is ..........................
What is the relationship between the focal length and radius of curvature?
Complete the following diagrams shown in the below figure by drawing the reflected ray for each incident ray.
Name the type of mirror used in the following situation:
Solar furnace
Support your answer with reason.
