Waec Physics 1992 Past Questions and Answers

Question 31:

• WAEC 1992

Which of the following is used for controlling the amount of light entering the eye?

A. Cornea
B. Pupil
C. Iris
D. Optic nerve
E. Ciliary muscle

Question 32:

• WAEC 1992

The angle of deviation of light of various colours passing through a glass prism decreases in the order of

A. Blue orange and red
B. Red, blue and orange
C. Blue, red and orange
D. Red, orange and blue
E. Orange, blue and red

Question 33:

• WAEC 1992

The change of the direction of a wavefront as a result of a change in the velocity of the wave in another medium is called

A. Refraction
B. Reflection
C. Diffraction
D. Polarization

Question 34:

• WAEC 1992

The diagram above shows a waveform in which energy is transferred from A to B in a time of 2.5 x 10-3s. Calculate the frequency of the wave

A. 2.0 x 10³Hz
B. 1.0 x 10³Hz
C. 4.0 x 10^-2Hz
D. 1.0 x 10^-3Hz
E. 5.0 x 10⁴Hz.

Question 35:

• WAEC 1992

Which of the following radiations have the highest frequency?

A. Radio waves
B. Light waves
C. X-rays
D. Infra-red rays
E. Ultraviolet rays