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 a possible unit for wavelength?

2. 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

3. When light in glass strikes the glass-air interface at an angle of incidence less than the critical angle, which of the following statement is true?

4. 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

5. Three rays of light are incident on the boundary between a glass block and air.

The angles of incidence are different.

possible critical angle

What is a possible critical angle for light in the glass?

6. Which of the following is a possible unit for period of a wave?

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

8. What is meant by the term wavefront?

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

lens pic 1

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

10. The loudness of a sound is determined by its _________.


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11 thoughts on “Practice MCQs For Waves, Light, Lens & Sound”

  1. I am unable to get a new set of MCQs. Even after refreshing the page I keep getting the same MCQs that I have already attempted

  2. I didn’t get the last MCQ. Like how can be waving your hand be a form of wave?
    And why can’t it be 1&4 because when you throw a stone, it would bang the window and would produce sound waves and shouting is also a kind of sound wave


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