Science Cycle Test T4 Flashcards
Define Wave:
A transfer of energy (disturbance) that spreads through a medium from the disturbance location, usually as vibrations in the medium.
Define Medium:
The material or substance through which the wave travels.
Define Transverse Wave:
Wave that consists of a disturbance occurring perpendicular (at right angles) to the travel direction of the wave
Define Longitudinal wave:
Wave that consists of a disturbance occurring parallel to the travel direction of the wave.
Define a Pulse Wave:
Wave that is caused by a single disturbance.
Define a Periodic Wave:
Wave that is caused by a continuous and repetitive disturbance.
Define Amplitude:
For any given position in the medium, the maximum displacement of the medium from its starting position.
Define Wavelength:
At any given (frozen moment of) time, the distance over which the wave’s shape repeats.
Define Period (Physics):
For any given position in the medium, the duration of a single vibration (oscillation).
Define Frequency:
For any given position in the medium, the number of vibrations per second.
Define Sound:
Longitudinal wave travelling through a medium which can be detected by the ear.
Define Pitch:
The frequency of the sound wave.
Define Electromagnetic waves:
A wave consisting of a vibrating electric field which causes a vibrating magnetic field.
Define Light:
Electromagnetic waves that can be detected by the eye.
Define Luminous object:
An object that gives off light.
Define Diffuse reflection:
The reflection of light from a surface such that a ray incident on the surface is scattered.
Define Specular reflection:
The reflection of light from a surface such that a ray incident on the surface is reflected at the same angle; mirror-like reflection.
Define Refraction:
The change in direction of a wave passing from one medium to another one, where it travels at a different speed.
Describe all electro-magnetic radiations speed whilst passing through a vacuum.
All electromagnetic radiation travels at the same speed in a vacuums.
If a water wave in the ocean has a frequency of 1.25Hz. It’s time period is:
0.8 seconds.
X-rays work because the bones…:
Absorb the radiation and are therefore visible.
List the 7 types of waves:
1) Radio Waves
2) Microwaves
3) Infrared
4) Visible light
5) Ultraviolet
6) X-ray
7) Gamma rays
What type of wave can be split into different colours?
Visible light.
What type of wave has the longest wavelenght?
Radio-waves.