Chapter 3 - Reflection Of Light From Spherical Mirrors

Question 0

Define:
Real image
Virtual image

Answer 0

A real image formed by the actual intersection of light rays

A virtual image is an image formed by the apparent intersection of Rays

Question 1

Explain;
Centre of Curvature
Axis
Focus
Focal length

Answer 1

• The centre of the sphere from which the mirror is made is called the centre of curvature of the mirror.
• The straight line joining the pole to the centre of curvature is called axis.
• The point halfway between the centre of curvature and the pole is called the focus.
• The distance from the focus to the pole is called the focal length.

Question 2

Define:

Magnification

Answer 2

The ratio of the height of the image to the height of the object is called the magnification e.g m=v/u

Question 3

Uses of concave mirrors

Answer 3

Searchlights
Floodlights
Shave or makeup mirror

Question 4

Uses of Convex mirrors

Answer 4

Wing mirrors of a car
In shops to deter shoplifters
In railway stations