true or false.[1 Mark each]

Question 11 Mark

The most common example of a convex mirror is the make – up mirror.

Answer

False.
Correct statement:
The most common example of a concave mirror is the make – up mirror.

Question 21 Mark

A thin layer of molten aluminium or silver is used for coating glass plates that will then become mirrors.

Answer

True.

Question 31 Mark

Curved mirrors produce images that are either enlarged or diminished.

Answer

True.

Question 41 Mark

Curved mirrors form the perfect image of an object.

Answer

False. Correct statement: Plane mirrors form the perfect image of an object.

Question 51 Mark

Curved mirrors have surfaces that are spherical, cylindrical, parabolic and ellipsoid.

Answer

True.

Question 61 Mark

The periscope is an optical device with a polished surface that reflects the light falling on it.

Answer

False.
Correct statement:
The mirror is an optical device with a polished surface that reflects the light falling on it.

Question 71 Mark

Light is a form of energy and it travels in a straight line.

Answer

True.

Question 81 Mark

We can see things around us only when the light reflected by them reaches our eyes.

Answer

True.

Science true or false.[1 Mark each]