Q1 of 42 Page 296

Write true or false for the following statements:

Laws of reflection are true only for plane mirror and not for curved mirrors.

False
The Laws of reflection are valid for any reflecting surface including spherical surfaces. So, they are valid for both plane and curved mirrors.

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15

An object is placed at a distance of 40 cm in front of a concave mirror of focal length 20 cm. The image produced is:

 16

Two plane mirrors are at right angles to each other. A man stands between them and combs his hair with the right hand. In how many images will he be seen using his left hand?

 2

Write true or false for the following statements:

The radius of curvature of a spherical mirror is half of the focal length.

 3

Write true or false for the following statements:

The rays travelling parallel to the principal axis after reflecting from the concave mirror pass or appear to pass throng the focus.