Fichas
P1 6 Electromagnetic Waves
Fichas del conjunto (16)
- 1Bandpart of the radio and microwave spectrum used for communication
- 2Big Bang theorythe theory that the universe was created in a massive explosion (the Big Bang) and that the universe has been expanding ever since
- 3Blue shiftdecrease 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
- 4Cosmic Microwave Background RadiationElectromagnetic radiation that has been travelling through space ever since it was created (as gamma radiation) shortly after the Big Bang
- 5Doppler EffectThe 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
- 6Electromagnetic spectruma set of radiations that have different wavelengths and frequencies but all travel at the same speed in a vacuum
- 7Electromagnetic waveElectric 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
- 8FrequencyThe number of wave crests passing a fixed point every second
- 9Infrared radiationElectromagnetic waves between visible light and microwaves in the electromagnetic spectrum
- 10Microwavepart of the electromagnetic spectrum
- 11Optical fibrethin glass fibre used to send light signals along
- 12Red Shiftincrease 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.
- 13Radio waveLongest wavelength of the electromagnetic spectrum
- 14Visible lightthe part of the electromagnetic spectrum that can be detected by the human eye
- 15Wavelengththe distance from one wave crest to the next wave crest (along the waves)
- 16Wave speedspeed of travel of a wave
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