Page 6 - HA-reflection through spherical mirror

a. Principal Axis

b. centre of curvature

c. The radius of Curvature

d. Pole

Ans. A

18 The distance from the pole to focus is called………….

a. Pole

b. Aperture

c. Principal Axis

d. focal length

Ans.D

19 The focal length is equal to half of the ……………..

a. centre of curvature

b. The radius of Curvature

c. Axis

d. none of the above

Ans.B

20 The point on principal axis at which parallel rays; coming from
infinity; coverage after reflection is called the ……………..

a. Principal Focus

b. Aperture

c. Principal Axis