Reflection of Light at Plane and Curved Surfaces - Jamb Physics Past Questions and Answers

Question 86:

• JAMB 2012

The inside portion of part of a hollow metal sphere of diameter 20cm is polished. The portion will therefore form a

A. Concave mirror of focal length 5cm
B. Concave mirror of focal length 10cm
C. Convex mirror of focal length 5cm
D. Convex mirror of focal length 20cm

Question 87:

• JAMB 2012

Total internal reflection occurs when light moves from

A. A dense medium to a less dense medium
B. Air to water
C. Water to glass
D. A less dense to a dense medium

Question 88:

• JAMB 2012

A projection lantern is used to give the image of a slide on a screen. If the image is 24 times as large as the slide and the screen is 72.0m from the projecting lens, what is the position of the slide from the lens?

A. 0.3m
B. 3.0m
C. 3.5m
D. 4.0m

Question 89:

• JAMB 2012

A ray of light strikes a plane mirror at an angle of incidence of 35°. If the mirror is rotated through 10°, through what angle is the reflected ray rotated?

A. 70°
B. 45°
C. 25°
D. 20°

Question 90:

• JAMB 2012

The driving mirror of a car has a radius of curvature of 1m. A vehicle behind the car is 4m from the mirror. Find the image distance behind the mirror.

A. 8/7
B. 4/9
C. 9/2
D. 4/7