Light & Electromagnetic waves
What are some examples of electromagnetic waves?
Radio, visible light, and X-rays
What type of wave is a sound wave?
Longitudinal
What are three types of mechanical waves?
Transverse, longitudinal, and surface waves.
What happens when two waves cancel each other out?
This is called a destructive interference.
What is the distance between two crests called?
The wavelength
What are electromagnetic waves?
They are transverse waves that can travel through empty spaces and they don’t need air or water to move.
What part of a sound waves determines pitch?
Frequencies
What do mechanical waves need in order to travel ?
They need a medium like air and water.
What type of wave travels parallel to its motion?
A longitudinal wave.
What is the highest point of a wave called?
The trough
What is the main purpose of frequency in electromagnetic waves?
The frequency is the physical quantity that decides the physical characteristics of electromagnetic waves.
How are sounds waves made?
They are created by the vibration of the sound.
What happens when the energy in a mechanical wave increase?
The amplitude increases.
A wave hits the surface and bounces off, what is this called?
Reflection
What is the lowest point of the wave called?
The crest
How do electromagnetic waves travel?
They travel through space as vibrating electric and magnetic field.
What medium does sound travel fastest through?
Solid
How do the particles of the medium move when a wave passes through them?
The particles of the medium just vibrate in place.
What is the formula for wave speed?
Speed=wavelength x frequency
What unit is used to measure frequency?
Hertz(Hz)
What happens to wavelength as frequency increases in the electromagnetic spectrum?
The wavelength gets shorter.
What part of a sound waves determines loudnesses?
The amplitude
What part of a longitudinal wave where the particles are spread apart?
Rarefaction
What type of wave travels perpendicular to its motion?
A transverse wave.
What is the number of waves that pass a point in one secon?
Frequencies