A point object is placed mid-way between two plane mirrors at distance 'a' apart. The plane mirror forms an infinite number of images due to multiple reflections. The distance between the first two images formed behind any mirror is:

a

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2 a

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a / 2

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4 a

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Solution

The correct option is A $a$
The distance between the first two images formed behind every mirror is equal to the distance between the 2 mirrors, irrespective of its distance from the 2 mirrors.
Hence, the distance will always be equal to ' $a$ '.

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A point object is placed mid-way between two plane mirrors at distance 'a' apart. The plane mirror forms an infinite number of images due to multiple reflections. The distance between the first two images formed behind any mirror is:

The correct option is A aThe distance between the first two images formed behind every mirror is equal to the distance between the 2 mirrors, irrespective of its distance from the 2 mirrors.Hence, the distance will always be equal to 'a'.

The correct option is A $a$
The distance between the first two images formed behind every mirror is equal to the distance between the 2 mirrors, irrespective of its distance from the 2 mirrors.
Hence, the distance will always be equal to ' $a$ '.