Science - Light and Sound
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
卡片预览 (24 张)
Waves transfers _____________ but not ______________.
Energy, matter
Transverse wave - the _______________ of the particles is __________________ to the direction of energy transfer
vibrations, perpendicular
Longitudinal wave - the _______________ of the particles is __________________ to the direction of energy transfer
vibrations, parallel
What is the wavelength?
Distance between consecutive crests/troughs (transverse). Distance between consecutive compressions/rarefactions (longitudinal).
What is the amplitude?
Distance from the equilibrium (rest position) to the crest/trough (transverse).
In a longitudinal wave, areas where the particles are pushed together are called _________________ and areas where the particles are spread out are called _________________
compressions, rarefactions
A louder sound will have a higher __________________.
amplitude
A high-pitched sound will have a higher _________________
frequency
Give 4 examples of longitudinal waves
sound, ultrasound, seismic waves, springs
Give 8 examples of transverse waves
light, radio, microwaves, infra-red, UV, X-ray, gamma ray, water waves
An object which gives off light is known as….
luminous
How can we see non-luminous objects?
because light is reflected off the object
When light hits and object and “stops” it is known as…
absorption
When light hits and object and bounces off it is known as…
reflection
A material that lets light through without scattering is known as…
transparent
What is an opaque material?
A material that does not let light pass through
An object that scatters light as it passes through is known as…
transluscent
How does the angle of incidence compare to the angle of reflection?
they are equal/the same
“If we are drawing a reflected ray, which step is missing 1. Extend the incident line to the surface. 2. 3. Measure angle of incidence. 4. Construct your angle of reflection.”
Draw on the normal line
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 it will bend _____________ the normal
towards
If the speed of a wave increases as it moves into a new substance it will bend _____________ the normal
away from
When the angle of incidence is greater than the critical angle, what will happen to the light?
All the light will be reflected/total internal reflection.