WAVES Revision

What property of the wave is represented by the letter "B"?

• amplitude

• crest

• trough

• wavelength

Answer explanation

The property of the wave represented by the letter 'B' is the amplitude, which is the maximum displacement of the wave from its equilibrium position.

The number of wavelengths that pass a point each per second is:

• frequency

• period

• longitudinal 

• transverse wave 

Answer explanation

The correct choice is frequency because it represents the number of wavelengths passing a point per second.

When the frequency of a wave increases, what happens to the wavelength?

• The wavelength is not directly affected by the frequency of a wave.

• The wavelength increases.

• The wavelength decreases.

• More specific information is needed to form a conclusion about the wavelength.

Answer explanation

When the frequency of a wave increases, the wavelength decreases. This is an inverse relationship described by the wave equation.

A mechanical wave cannot travel through...

• a vacuum(empty space).

• water.

• air. 

• glass.

Answer explanation

A mechanical wave cannot travel through a vacuum (empty space) because it requires a medium to propagate, and a vacuum lacks particles for the wave to interact with.

which material does sound travel the fastest?

• solid 

• liquid 

• gases

Answer explanation

Sound travels the fastest in solids because the particles are closer together, allowing the sound waves to travel more efficiently.

When a wave strikes and object and bounces off. (example echo)

• medium

• refraction

• reflection

• interference

Answer explanation

When a wave strikes an object and bounces off, it is known as reflection. This is similar to an echo where the sound wave reflects off a surface.

In a longitudinal wave, the particles move...?

• back and forth

• up and down

• vertically

• in the direction of the hertz

Answer explanation

In a longitudinal wave, the particles move back and forth.

___________________ happens as when crests of one wave overlap with the troughs of another wave

• Refraction

• Reflection

• Constructive Interference

• Destructive Interference

Answer explanation

Destructive Interference happens as when crests of one wave overlap with the troughs of another wave, resulting in cancellation of the waves.

What type of wave is pictured?

• Transversal

• Longitudinal

• Surface

• Seismic

Answer explanation

The wave pictured is a Longitudinal wave, where the particles move parallel to the direction of the wave propagation.

What do waves transfer?

• matter

• energy

• matter and energy

• the medium

Answer explanation

Waves transfer energy, not matter. Energy is the correct choice as waves carry energy from one place to another.