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

Question 71:

• JAMB 2004

If u is the object distance and v the image distance, which of the following expressions gives the linear magnification produced by a convex lens of focal length f?

A. ^u/_f - f
B. ^u/_v + f
C. ^v/_f + 1
D. ^v/_f - 1

Question 72:

• JAMB 2005

A thin converging lens has a power of 4.0 diopters determined its focal length.

A. 2.50m
B. 0.03m
C. 5.00m
D. 0.25m

Question 73:

• JAMB 2005

A real image three times the size of an object is formed 24cm from a converging mirror. what is the focal length of the mirror.

A. 16cm
B. 6cm
C. 8cm
D. 12cm

Question 74:

• JAMB 2006

An object placed 10cm from a concave mirror of focal length 5cm would have its image

A. At the centre of convature
B. At the radius of curvature
C. At infinity
D. 10 cm from the focus

Question 75:

• JAMB 2006

A person can focus objects when they lie beyond 75 cm from his eyes. The focal length of the lens required to reduce his least distance of distinct vision to 25 cm is?

A. 37.50 cm
B. 75.00 cm
C. 18.75
D. 25.00 cm