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

Question 31:

• JAMB 1989

A far sighted person cannot see objects that are less than 100cm away. If this person wants to read a book at 25cm, what type and focal length of lens does he need?

A. Convex, 20cm
B. Concave, 20cm
C. Convex, 33cm
D. Concave, 33cm

Question 32:

• JAMB 1989

An object is placed at 5.6 x 10^-4m in front of a converging lens of focal length 1.0 x 10^-nm. The image formed is

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

Question 33:

• JAMB 1990

An object which is 3cm high is placed vertically 10cm in front of a concave mirror. If this object produces an image 40cm from the mirror, the height of the image is

A. 0.75cm
B. 4.00cm
C. 8.00cm
D. 12.00cm

Question 34:

• JAMB 1990

A boy looks at the image of an object in a plane mirror. He observes two images, a main bright one and the other faint. The observed images result from

A. Reflection only
B. Refraction only
C. Diffraction and interference
D. Reflection and refraction
E. Reflection and diffraction

Question 35:

• JAMB 1990

What must be the distance between an object and a converging lens of focal length 20cm to produce an erect image two times the object height?

A. 20cm
B. 15cm
C. 10cm
D. 5cm