Question

define the centre of curvature ,focal point and magnification​

Answer 1

Answer:

The centre of curvature is the centre of the sphere from which the mirror is cut. The midpoint of the aperture is the pole of the mirror.

The focal point is the point in space at which light incident towards the mirror and traveling parallel to the principal axis will meet after reflection. The diagram at the right depicts this principle. In fact, if some light from the sun were collected by a concave mirror, then it would converge at the focal point.

The level of magnification is proportional to the ratio of v and u. An image that appears to be double the size of the actual object would have magnification m=2. The radius of curvature of a mirror is twice its focal length.

Answer 2

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