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प्रश्न
Explain the following term related to spherical lenses:- principal axis
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उत्तर
Principal Axis:-
The principal axis of a lens is a line passing through the optical centre of the lens and perpendicular to both the faces of the lens.
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संबंधित प्रश्न
Give one use each of a concave and a convex mirror.
Name the mirrors shown in Figure (a) and (b).
Figure shows a concave mirror with its pole at P, focus F and centre of curvature C. Draw ray diagram to show the formation of image of an object OA.
The diagram below in Figure, shows a convex mirror. C is its centre of curvature and F is its focus. (i) Draw two rays from A and hence locate the position of image of object OA. Label the image IB. (ii) State three characteristics of the image.
Name the kind of mirror used to obtain:
A virtual and diminished image
Write the spherical mirror's formula and explain the meaning of each symbol used in it.
