7. Explain the meaning of the terms focus and focal
length in case of a convex mirror, with the help of a
suitable ray diagram.
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Focus is defined as the point at which the ray or beam of light which are travelling parallel to the principal axis appears to meet after reflection.
focal length is defined as distance between center of curvature of the spherical mirror and its focus.
focus of convex mirror is positive(+ve
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Answer:
Focus of a convex mirror: The focus of a convex mirror is a point on the principal axis from which, the light rays incident parallel to principal axis, appear to come, after reflection from the mirror.
Focal length of a convex mirror: The distance of the focus from the pole of the convex mirror is called its focal length.
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