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  4. A thick mirror produces a number of images of an object. The brightest image is

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Q. A thick mirror produces a number of images of an object. The brightest image is

Rajasthan PMTRajasthan PMT 2003

Solution:

A thick mirror forms a number of images. $I_{1}$ image is formed by front surface which is unpolished and hence, reflects only a
image
small part of intensity of light; while second image is formed by polished surface which reflects most of intensity. Hence, second image is brightest.