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Explain the following term related to spherical lenses:- centres of curvature
A coin placed at the bottom of a vessel appears to be raised when water is poured in the vessel.
State the kind of mirror used
(a) by a dentist, and
(b) as a street light reflector.
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.
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 term principal focus in case of convex mirror. Draw a convex mirror and show its principal focus and focal length clearly.
What is the relationship between the focal length and radius of curvature?
Complete the following diagrams shown in the following figures by drawing the reflected rays.
