What are waves?

Which of these cannot travel through a vacuum?
Sound
Microwaves
Radio waves

What do we call the height of a wave?
Amplitude
Frequency
Wavelength

What do we measure in hertz in sound waves?
Amplitude
Frequency
Wavelength

What describes the spreading out of a wave after it has passed through a gap?
Refraction
Reflection
Diffraction

What size gap causes significant diffraction?
A gap that is sized similarly to the wavelength
A gap that is a little larger than the wavelength
A gap that is much larger than the wavelength

What are the units of frequency?
Metres
Hertz
Seconds

How do we calculate the frequency of a wave?
frequency = 1 × time period
frequency = distance ÷ time period
frequency = 1 ÷ time period

What is the period of a wave?
The distance it takes to complete one oscillation
The time it takes to complete one oscillation
The maximum disturbance from its undisturbed point

Which of these is not a type of electromagnetic radiation?
Infrared waves
Sound waves
Light waves

What is the wave speed equation?
speed = distance ÷ time
speed = frequency ÷ wavelength
speed = frequency × wavelength