Physics light reflection

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

• (a) virtual and erect

• (b) real and erect

• (c) real, inverted and of the opposite size as that of the object

• (d) real, inverted and of the same size as that of the object

Image formed by a convex spherical mirror is:

• (a) virtual

• (b) real

• (c) enlarged

• (d) inverted

Magnification produced by a rear view mirror fitted in vehicles:

• (a) is less than one

• (b) is more than one

• (c) is equal to one

• (d) can be more than or less than one depending upon the position of the object in front of it

A student conducts an activity using a concave mirror with focal length of 10 cm. He placed the object 15 cm from the mirror. Where is the image likely to form?

• (a) at 6 cm behind the mirror

• (b) at 30 cm behind the mirror

• (c) at 6 cm in front of the mirror

• (d) at 30 cm in front of the mirror

Which of the following mirror is used by a dentist to examine a small cavity?

• (a) Convex mirror

• (b) Plane mirror

• (c) Concave mirror

• (d) Combination of convex and concave mirror