Aqa Gcse Combined Science - Waves Already Passed

Period {Ans: The time taken for one wave to pass. Time period = 1 / frequency. Measured in seconds.}Reflection {Ans: A wave bouncing back as it hits the boundary between two materials.}Transverse wave {Ans: A wave in which the vibrations are at right angles to the direction of energy travel. All electromagnetic waves are transverse waves along with secondary seismic waves.}Electromagnetic waves {Ans: Waves that are made up of an electric wave and a magnetic wave at right angles to each other. There are 7 electromagnetic waves in the electromagnetic spectrum. They are all transverse and all travel at the same speed in a vacuum (300 000 000 m/s = speed of light).}Wave speed {Ans: The speed of a wave, measured in metres per second. Wave speed = frequency x wavelength.}Radio waves {Ans: Electromagnetic waves with the longest wavelength and lowest frequency. Used for communications. No known risks.}