Q20 of 112 Page 310

Name the phenomenon responsible for the following effect:

When we sit in front of a plane mirror and write with our right hand, it appears in the mirror that we are writing with the left hand.

the phenomenon is known as Lateral inversion. The effect produced by a plane mirror in reversing the images from left to right and right to left while forming images is lateral inversion.


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18

If an object is placed at a distance of 7.5 cm from a plane mirror, how far would it be from its image?

 19

Is the image of an object in a plane mirror: virtual or real?          

 21

Name a device which works on the reflection of reflected light.

 22

How are the two plane mirrors in a periscope arranged:

(a) with respect to one another?


(b) with respect to sides of the tube?