What's covered
Light: reflection and refraction10
Sound waves10
Waves: transverse and longitudinal10
Sample questions
A taste of the 30 questions in this topic — answers marked. Sign up to practise the full set with spaced repetition.
1Light: reflection and refraction
What is the speed of light in a vacuum?
- •3,000 m/s
- •3,000,000,000 m/s
- •300,000 m/s
- ✓300,000,000 m/s
2Sound waves
What kind of wave is sound?
- ✓Longitudinal mechanical wave
- •Standing wave only
- •Transverse electromagnetic wave
- •Transverse mechanical wave
3Waves: transverse and longitudinal
What is a wave?
- •A liquid flowing fast
- •A solid object moving forward
- ✓Energy travelling through a medium
- •Heat radiating from the sun
4Light: reflection and refraction
What does reflection mean for a light ray?
- •Bends when entering glass
- ✓Bounces off a surface
- •Passes through unchanged
- •Splits into many colours
5Sound waves
Why can't sound travel through a vacuum?
- ✓No particles to vibrate
- •Vacuum absorbs sound waves
- •Vacuum is too cold for sound
- •Vacuum reflects sound completely
6Waves: transverse and longitudinal
In a transverse wave, the oscillations are:
- •At 45° to direction of travel
- •Opposite to direction of travel
- •Parallel to direction of travel
- ✓Perpendicular to direction of travel
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