Flashcards
P1.5
Cards in this deck (16)
- 1Name all the waves in the electromagnetic spectrum in order of highest to lowest energy.Gamma
X-rays
Ultraviolet
Visible light
Infra red
Microwaves
Radiowaves - 2Electromagnetic waves with high energy have a short _________ and ________ frequency. It is the opposite for waves with low energy.1. Wavelength
2. High - 3How do radio waves transmit communications and what are they used to transmit?-Radio waves are transmitted from aerials on earth and then reflected of the ionosphere in the outer atmosphere to receivers.
-Radio waves are used to transmit tv and radio programs. - 4How do microwaves transmit communications and what are they used to transmit?-Microwaves are transmitted from aerials on earth to satellites orbiting earth which return the waves to aerials on earth.
-Microwaves are also transmitted using a network of tall aerials.
-Microwaves are used to transmit mobile phone signals. - 5Which waves are used in fibre optics and what is fibre used to transmit?-Infra red and visible light is used to transmit communications through fibre.
-Internet is the most common use of fibre. - 6What is the doppler effect?-The doppler effect is when wavelength of a sound appears to increase as the source of the sound moves away.
- 7What is red shift?-Red shift is when a light source moves away from you making its wavelength look bigger this means the light appears to have moved towards the red end of the light spectrum.
- 8The big bang theory suggests the universe is still expanding how does CMBR prove this?When the big bang took place short wavelength gamma radiation was released this is now detected as having a long wavelength only the big bang can explain the existence of CMBR
- 9What is diffraction?Diffraction is the spreading out of waves as they pass through a barrier this is most noticeable with long wavelengths.
- 10What is refraction?Refraction is when a ray of light enters a material and its direction of travel changes when it leaves the material the ray that leaves will be parallel to the one that entered.
- 11What does this show?-Image in a plane mirror
- 12When reflecting light the angle of reflection is equal to the angle of _______incidence
- 13How do we hear soundWhen an object moves the air around it vibrates and you hear it when those vibrations hit your ear drum and vibrate it.
When the waves have a low frequency they have a low pitch and visa versa - 14Label the image
- 15Describe transverse wavesLight is an example of this type of wave
- 16Describe longitudinal wavessound is an example of this type of wave
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- GCSE Science (Physics) Flashcards on P1.5, created by 11joseph.donovan on 15/04/2016.
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- 11joseph.donovan
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