Reflection at plane and curved mirrors

Question 1 of 10

A concave mirror with a radius of curvature of 40 cm has a focal length of ___ cm.

Question 2 of 10

A periscope uses

A. one convex mirror B. two plane mirrors at 45° C. two concave mirrors D. a lens only

Question 3 of 10

The image formed by a convex mirror is always

A. virtual, upright and diminished B. real and inverted C. magnified D. at infinity

Question 4 of 10

An object is placed 30 cm from a concave mirror of focal length 12 cm. Find the image distance.

A. 8.57 cm B. 20 cm C. 18 cm D. 42 cm

Question 5 of 10

Two parallel plane mirrors produce an infinite number of images.

A. True B. False

Question 6 of 10

Explain, with a diagram, why a plane mirror needs to be only half the height of a person for them to see their full image.

Question 7 of 10

An object is placed 60 cm from a concave mirror of focal length 20 cm. Find the magnification.

A. 2 B. 0.33 C. 1.5 D. 0.5

Question 8 of 10

How many images are formed by two plane mirrors inclined at 120°?

A. 3 B. 2 C. 4 D. 12

Question 9 of 10

The focal length of a curved mirror is

A. equal to its radius of curvature B. twice its radius of curvature C. always 10 cm D. half its radius of curvature

Question 10 of 10

The laws of reflection state that the angle of incidence equals

A. the angle of refraction B. twice the angle of reflection C. the angle of reflection, and both rays and the normal lie in one plane D. 90°

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Questions written by OtisamLMS in the style of the WASSCE. They are not WAEC past questions.

Past questions, worked solutions and curriculum-mapped study material for JHS and SHS students and teachers in Ghana.

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