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

Question 106:

• JAMB 2018

If the focal length of a camera is 20cm, the distance from the film at which the lens must be set to produce a sharp image of 100cm away is

A. 17cm
B. 20cm
C. 25cm
D. 100cm

Question 107:

• JAMB 2018

The image of an object is located 6cm behind a convex mirror. If it's magnification is 0.6, calculate the focal length of the mirror

A. 3.75cm
B. 6.70cm
C. 10.00cm
D. 15.00cm

Question 108:

• JAMB 2018

A lens of focal length 15cm forms on erect image which is three times the size of the object. The distance between the object and the image is ___.

A. 10cm
B. 20cm
C. 30cm
D. 40cm

Question 109:

• JAMB 2019

The distance between an object and its real image in a convex lens is 40cm. If the magnification of the image is 3, calculate the focal length of the lens

A. 6.5 cm
B. 7.5 cm
C. 8.5 cm
D. 4.5 cm

Question 110:

• JAMB 2019

A ray of light passes through the centre of curvature of a concave mirror and strikes the mirror. At what angle is the ray reflected?

A. 180\(^o\)
B. 90\(^o\)
C. 0\(^o\)
D. 60\(^o\)