1.

The number of image of an object placed between two plane parallel mirrors is _____

Answer»

two
one
infinite
Cannot be determined.

Solution :When two MIRROR are placed PARALLEL to each other. The image of an object formed by one mirror acts like virual object for ANOTHER mirror, and its VIRTUAL image acts like virtual object for previous one and this process continues and an infinite number of images are formed by the two mirrors.
(or)
`n=(360)/(theta)-1`
`theta=0^(@)`
`impliesn=(360)/(0)-1`
`n=oo-1=oo="infinite"`


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