Practice MCQs For Waves, Light, Lens & Sound

This quiz contains practice questions for GCE ‘O’ level topics: General Waves Properties, Reflection and Refraction Of Light, Converging Lens, Electromagnetic spectrum, Sound. There are explanations for some of the questions after you submit the quiz. If you could not figure out why a particular option is the answer, feel free to drop a comment below or ask a question in ‘O’ & ‘A’ Level Discussion section of the forum. If you wish to contribute questions to this quiz, please contact us.

The quiz comprises of 10 questions, which are randomly selected from a large pool of questions. After completion, you can refresh the page and try the quiz again for a new set of 10 questions.

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1. Which of the following is the unit for frequency?

metre per second

joule per second

oscillation per second

coulomb per second

2. Which of the following is the unit for frequency?

hertz

ampere

tesla

meter per second

3. Which of the following is/are longitudinal wave(s)?

A. The sound produced by a bat

B. The light from the Sun

C. The ripples on the surface of the water

B and C only

A and B only

A and C only

A only

4. A star explodes in outer space.

Which waves from the exploding star do not reach the Earth?

Sound

Infra-red

Light

Radio

5. Which of the following is not possible?

A mole hears another mole underground.

An explosion is heard by an astronaut when a laser beam hits an enemy fighter in space.

A whale hears another whale in the deep sea.

A man knocks at one end of a long metal pipe and another man hears the knock at the other end.

6. Which of the following is/are the properties of electromagnetic waves?

A. All electromagnetic waves have a speed of $3 \times 10^{8} \, \text{m s}^{-1}$ in vacuum.

B. All electromagnetic waves are transverse waves.

C. All electromagnetic waves can be seen by the naked eye.

B only

A, B and C

A and B only

A only

7. Water waves refract at a boundary between deep water and shallow water.

What is the effect on the frequency, wavelength and speed of the waves at the boundary?

	Frequency	Wavelength	Speed
A	Changes	Changes	Stays the same
B	Changes	Stays the same	Stays the same
C	Stays the same	Changes	Changes
D	Stays the same	Stays the same	Changes

C

A

D

B

8. Which of the following does not produce a sound wave?

A bell ringing under water

An explosion in outer space

A hammer hitting a block of rubber

A gun fired in a room

9. A student stands 50 m from a wall and knocks two wooden blocks together. When the frequency of knocking is 3 knocks per second, the echo of a knock is heard at the instant of the next one.

What is the speed of sound in air?

200 m/s

150 m/s

300 m/s

350 m/s

10. Which option shows parts of the electromagnetic spectrum in order of increasing frequency?

X-rays, radio waves, visible light

radio waves, X-rays, visible light

X-rays, visible light, radio waves

radio waves, visible light, X-rays

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