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प्रश्न
Define the following term in the context of spherical mirrors:- Principal focus
उत्तर
Principal focus of a spherical mirror:-
The focus (F) is the point on the principal axis of a spherical mirror where all the incident rays parallel to the principal axis meet or appear to diverge from after reflection.
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संबंधित प्रश्न
Explain the following term related to spherical lenses:- optical centre
Give one use each of a concave and a convex mirror.
Complete the following sentence:
All the distances are measured from the .......... of a spherical mirror.
The diverging lens in part (a) is replaced by a converging lens also of focal length 100 mm. The object remains in the same position and an image is formed by the converging lens. Compare two properties of this image with those of the image formed by the diverging lens in part (a).
State the types of mirrors used for (i) headlights and (ii) rear view mirror, in cars and motorcycles. Give to justify your answer in each case.
Name the spherical mirror which (i) diverges (ii) converges the beam of light incident on it. Justify your answer by drawing a ray diagram in each case.
For what position of object, the image formed by a concave mirror is magnified and erect?
Define the following term in relation to concave mirror.
Pole
The distance from the center of curvature of the mirror to the pole is called the focal length of the mirror.
