Light And Sound Flashcards
(36 cards)
What does a wave transfer?
Energy, not matter.
In a transverse wave, how is the vibration of the particles oriented?
Perpendicular to the direction of energy transfer.
In a longitudinal wave, how is the vibration of the particles oriented?
Parallel to the direction of energy transfer.
What feature of the wave is shown on the diagram?
Wavelength.
What feature of the wave is shown on the diagram?
Amplitude.
What are areas where particles are pushed together in a longitudinal wave called?
Compressions.
What are areas where particles are spread out in a longitudinal wave called?
Rarefactions.
What does a louder sound have in terms of amplitude?
A higher amplitude.
What does a high-pitched sound have in terms of frequency?
A higher frequency.
Give an example of a longitudinal wave.
Sound.
Give an example of a transverse wave.
Light (also radio, microwaves, infra-red, UV, X-ray, gamma ray, water waves).
What is an object that gives off light known as?
Luminous.
How can we see non-luminous objects?
Because light is reflected off the object.
What is it called when light hits an object and ‘stops’?
Absorption.
What is it called when light hits an object and bounces off?
Reflection.
What is a material that lets light through without scattering known as?
Transparent.
What is an opaque material?
A material that does not let light pass through.
What is an object that scatters light as it passes through known as?
Translucent.
How does the angle of incidence compare to the angle of reflection?
They are equal/the same.
What is refraction?
The change in direction of a wave when it changes speed.
When does refraction occur?
When a wave moves into a different substance.
If the speed of a wave decreases as it moves into a new substance, how does it bend?
Towards the normal.
If the speed of a wave increases as it moves away from a substance, how does it bend?
Away from the normal.
What does a wave transfer?
A wave transfers energy, not matter.
