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Physics made simple

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Teaching physics for IIT-JEE through simple problems.

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Sunil D

Posted on Jun 09, 2013 1:22 PM

A ray is travelling parallel to the principal axis of a concave mirror of focal length f. It falls on the mirror and gets reflected. If the reflected ray has to pass through the pole of the mirror, what is the angle of incidence that it makes with the mirror?

Sunil D

Posted on Jun 07, 2013 12:53 PM

An object is placed at a distance of 8cm from one surface of a parallel sided glass slab of thickness 6 cm, the other surface of which is silvered. The r.I of glass is n. The image of this object is formed 10 cm behind the mirror. Find n.

Sunil D

Posted on Apr 07, 2013 9:29 AM

In front of a plane mirror say at some distance and parallel to it, a man walks with some velocity. An object O is placed between the track along which he walks and the mirror, right in front of the midpoint of the mirror. If he can see the image of the object while he walks along the track for some time, does he find the image to be formed at one point behind the mirror or does the image position keep changing as he walks?