Waves Achieve Flashcards
What do all waves transfer?
Energy
Define a longitudinal wave.
A longitudinal wave is a wave vibrating in the direction of propagation.
Define a transverse wave.
A transverse wave is a wave vibrating perpendicular to the direction of propagation.
What type of wave is a sound wave?
Longitudinal
.
What type of wave is a water wave?
Transverse
.
What type of wave is a gamma ray?
Transverse
What is diffraction?
Diffraction is when a wave passes an object and bends around it.
When a wave diffracts does its wavelength change?
No, wavelength stays constant.
.
When a wave diffracts does its speed change?
No, speed stays constant.
Do waves with a long wavelength diffract more or less than short wavelength waves?
More
What diffracts more, radio waves or microwaves?
Radio waves
What diffracts less, microwaves or infra red?
Infra red
What part of the electromagnetic spectrum has a frequency higher than x-rays?
Gamma
What part of the electromagnetic spectrum has a longer wavelength than microwaves.
Radio (and TV) waves
What part of the electromagnetic spectrum has a longer wavelength than visible light but a frequency higher than microwaves.
Infra red
Suggest an application for ultraviolet light.
Detect counterfeit currency
Tanning salon
Treat acne
Name a detector for radio waves.
Arial
Name a source of gamma rays.
Nuclear waste
Describe the speed of gamma rays compared to radio waves.
They travel at the same speed
What speed does everything travel in the electromagnetic spectrum?
3 × 10 8 m/s
Calculate the time it takes a radio wave to travel 600 km.
2 ms
Define refraction of light?
The change in speed of light entering a different medium that is more or less dense.
A ray of light enters a glass block from air along the normal. What happens to the ray of light?
It slows down but keeps travelling in the same direction.
A ray of light exits a glass block into air along the normal. What happens to the ray of light?
It speeds up but keeps travelling in the same direction.
