LIGHT (REFLECTION AND REFRACTION)

The angle between an incident ray and the plane mirror is 30°. The total angle between the incident ray and reflected ray will be :

(a) 30° (b) 60° (c) 90° (d) 120°

• A

• B

• C

• D

The image formed by a plane mirror is :

(a) virtual, behind the mirror and enlarged.

(b) virtual, behind the mirror and of the same size as the object.

(c) real, at the surface of the mirror and enlarged.

(d) real, behind the mirror and of the same size as the object.

• A

• B

• C

• D

The figure given alongside shows the image of a clock as seen in a plane mirror. The correct time is :

(a) 2.25 (b) 2.35 (c) 6.45 (d) 9.25

• A

• B

• C

• D

According to New Cartesian Sign Convention :

(a) focal length of concave mirror is positive and that of convex mirror is negative

(b) focal length of both concave and convex mirrors is positive

(c) focal length of both concave and convex mirrors is negative

(d) focal length of concave mirror is negative and that of convex mirror is positive

• A

• B

• C

• D

Linear magnification produced by a concave mirror may be :

(a) less than 1 or equal to 1

(b) more than 1 or equal to 1

(c) less than 1, more than 1 or equal to 1

(d) less than 1 or more than 1

• A

• B

• C

• D

A concave mirror produces a magnification of + 4. The object is placed :

(a) at the focus

(b) between focus and centre of curvature

(c) between focus and pole

(d) beyond the centre of curvatur

• A

• B

• C

• D

A boy is standing in front of and close to a special mirror. He finds the image of his head bigger than normal, the middle part of his body of the same size, and his legs smaller than normal. The special mirror is made up of three types of mirrors in the following order from top downwards :

(a) Convex, Plane, Concave

(b) Plane, Convex, Concave

(c) Concave, Plane, Convex

(d) Convex, Concave, Plane

• A

• B

• C

• D

If the image formed is always virtual, the mirror can be :

(a) concave or convex (b) concave or plane (c) convex or plane (d) only conve

• A

• B

• C

• D

Whatever be the position of the object, the image formed by a mirror is virtual, erect and smaller than the object. The mirror then must be :

(a) plane (b) concave (c) convex (d) either concave or convex

• A

• B

• C

• D

A real image of an object is to be obtained. The mirror required for this purpose is (a) convex (b) concave (c) plane (d) either convex or concave

• A

• B

• C

• D