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Q.5. Define centre of curvature and focus of a concave mirror.

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Solution

Focus is the point on principal axis on which Rays coming from infinity after reflection from mirror passes. Centre of curvature is the point which is double the length of focus of the mirror and is a centre of the sphere of which the mirror was a part

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Explain with a suitable diagram, how a concave mirror converges a parallel beam of light rays. Mark clearly the pole, focus and centre of curvature of concave mirror in this diagram.

Q. A concave mirror produces magnification of +4. The object is placed:

(a) at the focus
(b) between focus and centre of curvature
(c) between focus and pole
(d) beyond the centre of curvature

Question 30
Draw ray diagrams showing the image formation by a concave mirror when an object is placed

(a) between pole and focus of the mirror
(b) between focus and centre of curvature of the mirror
(c) at centre of curvature of the mirror
(d) a little beyond centre of curvature of the mirror
(e) at infinity

Q. If a concave mirror forms a real magnified image of an object, the object is located

(a) between pole and focus
(b) between focus and centre of curvature
(c) beyond centre of curvature
(d) at centre of curvature

In order to obtain a magnification of −2 (minus 2) with a concave mirror, the object should be placed:
(a) between pole and focus
(b) between focus and centre of curvature
(c) at the centre of curvature
(d) beyond the centre of curvature

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Solve this Q.5. Define centre of curvature and focus of a concave mirror.

Focus is the point on principal axis on which Rays coming from infinity after reflection from mirror passes. Centre of curvature is the point which is double the length of focus of the mirror and is a centre of the sphere of which the mirror was a part

Solve this
Q.5. Define centre of curvature and focus of a concave mirror.