P1 6 Electromagnetic Waves

MrsBoyson
Flashcards by MrsBoyson, updated more than 1 year ago
MrsBoyson
Created by MrsBoyson almost 6 years ago
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Flash cards to help you learn the key words in AQA P1 6 Electromagnetic Waves

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Question Answer
Band part of the radio and microwave spectrum used for communication
Big Bang theory the theory that the universe was created in a massive explosion (the Big Bang) and that the universe has been expanding ever since
Blue shift decrease in the wavelength of electromagnetic waves emitted by a star or galaxy due to its motion towards us. the faster the speed of the star or galaxy, the greater the blue shift is
Cosmic Microwave Background Radiation Electromagnetic radiation that has been travelling through space ever since it was created (as gamma radiation) shortly after the Big Bang
Doppler Effect The change of wavelength (and frequency) of the waves from a moving source due to the motion of the source towards or away from the observer
Electromagnetic spectrum a set of radiations that have different wavelengths and frequencies but all travel at the same speed in a vacuum
Electromagnetic wave Electric and magnetic disturbance that transfers energy from one place to another. The spectrum of electromagnetic waves, in order of increasing wavelength is: gamma and x-rays, ultraviolet, visible light, infrared, microwaves and radio waves
Frequency The number of wave crests passing a fixed point every second
Infrared radiation Electromagnetic waves between visible light and microwaves in the electromagnetic spectrum
Microwave part of the electromagnetic spectrum
Optical fibre thin glass fibre used to send light signals along
Red Shift increase in the wavelength of electromagnetic waves emitted by a star or galaxy due to its motion away from us. The faster the speed of the star or galaxy, the greater the red-shift is.
Radio wave Longest wavelength of the electromagnetic spectrum
Visible light the part of the electromagnetic spectrum that can be detected by the human eye
Wavelength the distance from one wave crest to the next wave crest (along the waves)
Wave speed speed of travel of a wave
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