Reflection of light

An insect is sitting 80 cm in front of a plane mirror m if the mirror is now moved 0.2 m away from the insect how does the image of the insect from its previous image

• 0.2 m

• 0.4 m

• 0.6 m

• 1.2 m

Two plane mirrors are placed parallel and facing each other.A light ray incident on one of the plane mirror at an angle of 45° after reflection from it strikes the other mirror.What is the angle between the incident ray and final reflected ray

• 45°

• 60°

• 90°

• 75°

Which of the following images can be formed by a concave mirror?

I. real, inverted, and enlarged

II. virtual, upright, and enlarged

III. real, upright, and reduced

IV. virtual, inverted, and enlarged

• I and II

• I and III

• I, III, and IV

• II and IV

Which of the following would be an example of using a convex mirror effectively?

• Satellite dishes for collecting radio waves

• Otoscopic mirror for concentrating light

• Dental mirror for closer examination

• Security mirror in store to increase range of view

Which of the following statements correctly identifies a rule for drawing ray diagrams with mirrors?

• A ray incident along the radius of curvature is reflected back on itself.

• A light ray parallel to the principal axis of the mirror is reflected so that it appears to come from the radius of curvature.

• A ray that strikes the mirror at its center at the certain angle is reflected symmetrically backwards .

• A light ray pointed directly at the focal point is reflected such that the angle of incidence is equal to the angle of reflection.

If you stand 3 m in front of a plane mirror, how far away would you see yourself in the mirror?

• 1.5 m

• 3 m

• 6 m

• 12 m

Which of the following best describes the image formed by a plane mirror?

• virtual, inverted and enlarged

• real, inverted and reduced

• virtual, upright and the same size as object

• real, upright and the same size as object

Which of the following best describes the image formed by a convex mirror when the object distance from the mirror is less than the absolute value of the focal length (f)?

• virtual, upright and enlarged

• real, inverted and reduced

• virtual, upright and reduced

• real, inverted and enlarged

When the image of an object is seen in a plane mirror, the distance from the mirror to the image depends on

(a) the wavelength of light used for viewing.

(b) the distance from the object to the mirror.

(c) the distance of both the observer and the object to the

mirror.

• Only a

• Only b

• Only c

• Both b and c

If a man wishes to use a plane mirror on a wall to view both his head and his feet as he stands in front of the mirror, the required length of the mirror

• is equal to the height of the man.

• is equal to one half the height of the man.

• is equal to double the height of the man.

• depends on the distance the man stands from the mirror.