Electromagnetic spectrum
The colour of light with the longest wavelength.
Red
A material that does not allow light to pass through is called...
Sound travels fastest in this type of medium.
Solid
The transfer of heat through collisions between particles.
What is conduction?
Which electromagnetic wave has the longest wavelength?
Radio waves.
The Electromagnetic wave with the shortest wavelength.
Gammar Ray
What is the law of Reflection?
Angle of incidence = the angle of reflection
What does amplitude measure in a wave?
The height of the wave from the middle (rest position) to the crest (top); it relates to the wave’s energy.
The transfer of heat through the flow of particles.
What is convection?
Why does sound travel faster in water than in air?
Because water is denser and particles are closer together.
These waves, located between radio waves and infrared radiation on the spectrum, are commonly used in cooking and in mobile phone signals.
What are microwaves?
What is refraction
Refraction is the bending of light as it passes from one medium to another with a different optical density (for example, from air into water or glass).
What are longitudinal waves?
The particles in this wave move backwards and forwards, the same direction as the energy transfer.
What is radiation?
Heat transfer through electromagnetic waves.
What are the two main types of reflection?
Regular - incidence = reflection
Diffuse - light is scattered
The part of the wave that measures the loudness/volume
What is amplitude?
Which medium does light travel fastest: air, water, or glass.
AIR
Measured from crest to crest or trough to trough and is equal to one vibration.
What is wavelength?
What are insulators? Give an example
Materials that are poor conductors, such as foam, wool and fibreglass.
When white light passes through a glass prism, it splits into a spectrum of colors.
What property of a wave determines its pitch (in sound) or colour (in light)?
Frequency
What happens to the direction of light when it enters a denser medium at an angle?
It bends toward the normal (refraction).
Sound cannot travel through this
Vacuum
The temperature at which all particle motion stops. What is this called?
absolute zero (0 K or -273°C)
What happens to sound energy when it moves through a less dense medium?
It loses energy faster (more attenuation).