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.

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1. A star explodes in outer space.

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

Radio

Light

Infra-red

Sound

2. Which of the following is not possible?

A mole hears another mole underground.

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

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.

3. We can hear sound when a ball strikes the floor because ___________.

the air particles from the floor vibrate and produce longitudinal waves to flow through the air into our ears.

the air particles from the floor vibrate and produce transverse waves to flow through the air into our ears.

the air particles from the floor flowed into our ears.

the wavelength of the sound wave is large enough to produce the sound.

4. When water waves move from a deeper to a shallower region, ______________.

Its frequency decreases.

Its wavelength decreases.

Its wavelength increases.

Its frequency increases.

5. Two notes are played on a guitar. The second note is louder and has a higher pitch. The second note is

higher in both amplitude and frequency

lower in both amplitude and frequency

lower in amplitude and higher in frequency

higher in amplitude and lower in frequency

6. 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

B

D

A

7. Which of the following are properties of a plane mirror image?

A. The image is the same size as the object.

B. The image is upright.

C. The image is laterally inverted.

A only

B and C only

A and B only

A, B and C

8. The pitch of a sound is determined by its _________.

wavelength

amplitude

frequency

speed

9. A lens forms a blurred image of an object on a screen.

How can the image be made sharp and in focus on the screen?

by using a lens of longer focal length at the same position

by using a brighter object at the same position

by moving the screen away from the lens and the object

by moving the object away from the lens and screen

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

ampere

hertz

tesla

meter per second

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