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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 can produce a real and diminished image of an object.
Name the spherical mirror which can produce a virtual and diminished image of an object.
For what position of object, the image formed by a concave mirror is magnified and erect?
An object of length 4 cm is placed in front of a concave mirror at distance 30 cm. The focal length of mirror is 15 cm.
- Where will the image form?
- What will be the length of image?
Define the following term in relation to concave mirror.
Pole
Define the following term in relation to concave mirror.
Radius of curvature
Define the term Aperture.
The distance from the center of curvature of the mirror to the pole is called the focal length of the mirror.
