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

Question 21:

• JAMB 1986

A lens of focal length 12.0cm forms an upright image three times the size of a real object. The distance between the object and the images is

A. 8.0cm
B. 16.0cm
C. 24.0cm
D. 32.0cm

Question 22:

• JAMB 1986

A dentist obtains a linear magnification of 4 of a hole in a tooth by placing a concave mirror at a distance, of 2.0cm from the tooth. The radius of Curvature of the mirror is

A. 5.3cm
B. 3.2cm
C. 2.7cm
D. 1.6cm

Question 23:

• JAMB 1986

What is the effect of the increase in the size of the hole of a pin-hole camera on the image? it

A. Gives a blurred image
B. Corrects for chromatic aberration
C. Magnifies the image
D. Brings the image into a sharper focus

Question 24:

• JAMB 1986

A pencil is placed vertically between a concave mirror and its focal point. The image of the pencil in the mirror will be

A. Real, inverted and diminished
B. Virtual, inverted and enlarged
C. Real, erect and enlarged
D. Virtual, erect and enlarged

Question 25:

• JAMB 1987

If an object is placed in front of two mirrors inclined at 90^o, how many images will be formed?

A. Five
B. Four
C. Three
D. Two