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प्रश्न
Define the following term in the context of spherical mirrors:- Principal focus
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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
One half of a convex lens of focal length 10 cm is covered with a black paper. Can such a lens produce an image of a complete object placed at a distance of 30 cm from the lens? Draw a ray diagram to justify your answer. A 4 cm tall object is placed perpendicular to its principal axis of a convex lens of focal length 20 cm. The distance of the object from the lens is 15 cm. Find the nature, position and the size of the image.
State the two kinds of spherical mirror and distinguish them with the aid of proper diagrams.
Explain the following term:
Incident ray
Draw diagram/diagrams to show them.
State the number of images of an object placed between two mirrors, formed in each case when mirrors are inclined to each other at (a) 90°, and (b) 60°.
Explain the meaning of the terms focus and focal length in case of a convex mirror, with the help of suitable ray diagram.
Complete the following diagrams in Figure by drawing the reflected rays for the incident rays 1 and 2.
Define the following term:
concave mirror
