# 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 statement about the speed of sound is correct?
2. Which application uses microwaves?
3. In which of the diagrams is the path of light ray not correct?

4. 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
5. The wavelength of a wave is ___________.
6. We can hear sound when a ball strikes the floor because ___________.
7. 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
8. The speed of sound in air, water and steel is different. Which of the following sequence, showing the speed of sound in ascending order, is correct?
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?
10. Which statement is correct?

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