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A highly polished surface such as a mirror reflects most of the light falling on it. In our daily life we use two types of mirrors — plane and spherical. The reflecting surface of a spherical mirrors may be curved inwards or outwards. In concave mirrors, reflection takes place from the inner surface, while in convex mirrors reflection takes place from the outer surface.
The heat produced at a point due to concentration of sunlight by a convex lens burns a paper.
Define the following terms in the context of a diverging mirror : (i) Principal focus (ii) Focal length Draw a labelled ray diagram to illustrate your answer.
What is the term used for the distance between the mirror and the paper?
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