Waves assessment 3

Amplitude of a wave show us

• The distance between wave crests

• Amount of energy from the source

• The speed at which the wave is traveling

• There is no sound

If the velocity of the wave is 400 m/s and the wavelength is 2m, what is its frequency?

• 800 Hz

• 400 Hz

• 200 Hz

• 20 Hz

The earthquake wave that shakes objects side to side

• L wave

• Liquifaction

• S Wave

• P wave

The fastest and first earthquake wave

• L wave

• Focus wave

• S wave

• P wave

Assume in both pictures the people are the same distance apart. Which picture would allow them to communicate better. Explain why using the information we have in class.

What kind of wave is this?

• Refracted

• Longitudinal

• Transverse

• Light

b

c

d

e

a

Trough

Wavelength

origin

Crest

Amplitude

The wavelength of a wave tell us

• Density

• Amplitude

• Origin

• Frequency

Why do we see orange? Explain with details. Do not worry about the parts of the eye.

The earthquake wave that can throw objects off the ground

• P wave

• L wave

• Epicenter wave

• S wave

Answer explanation

1. Rayleigh waves

The first type – Rayleigh waves – is a type of surface wave that moves the particles of the medium in both vertical and horizontal directions along the vertical surface. This type of wave is deemed to be relatively slow compared to body waves. Rayleigh waves are named after the British physicist who was the first to demonstrate the existence of Rayleigh waves mathematically: Lord Rayleigh.

2. Love waves

Love waves are surface waves that move the medium’s particles along only the horizontal plane in the perpendicular direction of the wave propagation. Compared to Rayleigh waves, these waves yield a considerable amount of pressure on objects on the surface, such as tall buildings, by damaging the structure’s foundation.