The image formed by a plane mirror is
virtual, erect, behind the mirror and smaller than the object.
virtual, erect, behind the mirror and the same size as the object.
virtual, inverted, behind the mirror and the same size as the object.
real, erect, behind the mirror and the same size as the object.
Periscope works on the principle of multiple reflections. It consists of two or more mirror, used for the reflection. If the two mirrors are placed at an angle of 90°, how many images of the object are formed between them?
one
Two
Three
Four

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Solution

Dear student,
1. The image formed by a plane mirror is virtual, erect, behind the mirror and the same size as the object.
2. Periscope works on the principle of multiple reflections. It consists of two or more mirror, used for the reflection. If the two mirrors are placed at an angle of 90°, Three images of the object are formed between them.
(calculation: If two plane mirrors are inclined at an angle of 90° to each other, then the number of images formed can be calculated using the formula,
$n = \frac{360}{θ} = \frac{360}{90} = 4 b u t a s 4 i s e v e n n u m b e r, t h e n t h e n u m b e r o f i m a g e w i l l b e n - 1 = 4 - 1 = 3 a s o n e o u t o f t h i s f o u r i m a g e s u p e r i m p o s e o n a n a n o t h e r i m a g e)$

Regards,

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Periscope works on the principle of multiple reflection. It consists of two or more mirror, used for the reflection. If the two mirrors are placed at an angle of $90^{\circ}$ , how many images of the object are formed between them?

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