Q1 of 61 Page 63

a) Complete the diagram to show how a concave mirror forms the image of the object.

b) What is the nature of the image?



(a)


(b) When the object AB is placed between the centre of curvature and principal focus, then the ray AD going parallel to the principal axis and another ray AE passing through the principal focus F intersect each other at point A’ beyond the centre of curvature. Thus the image formed in this case is beyond C, enlarged, real and inverted.


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What is the speed of light in a vacuum? Who first measured the speed of light?

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Concave mirrors are used by dentists to examine teeth. Why?

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Pick out the concave and convex mirrors from the following and tabulate them

Rear-view mirror, Dentist’s mirror, Torch-light mirror, Mirrors in shopping malls, Make-up mirror.


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State the direction of incident ray which after reflection from a spherical mirror retraces its path. Give reason for your answer.