# GCSE Physics

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1. What are waves
Waves are vibrations that transfer energy from on place to place without without matter being transformed
2. Waves have
Amplitude ,wavelength and frequency
3. Waves can be either
Transverse or longitudinal
4. Transverse waves have
Sideways vibrations the vibrations are perpendicular to the direction of energy transfer of the wave
5. Tarnsverse waves include
• Light and all other electromagnetic waves
• Ripples on water
• Waves on strings
• A slinky spring wiggled up and down
6. Longitudinal waves have
• Vibrations along the same line
• In longitudinal waves the vibrations are parallel to the direction of energy transfer of the wave
7. Examples of longitudinal waves are
• Sound waves an ultrasound
• Shock waves eg seismic waves
• A slinky spring when you push the end
8. Transverse , longitudinal or both
The wave carriers energy from one place to another
Both
9. Transverse , longitudinal or both
The substance it travels through does not travel with the the wave
Both
10. Transverse ,longitudinal or both
The waves cause regular disturbances
Both
11. Transverse , longitudinal or both
The waves causes peaks and troughs in the substance
Transverse
12. Transverse , longitudinal or both
The wave stretches and compresses the substance
Longitudinal
13. The amplitude is the
Displacement from the rest position to the crest (or trough)
14. Wavelength is the f
Full cycle of the wave e.g. from crest to crest
15. Frequency is t
The number of complete waves passing a certain point per second or the number of waves produced by a source per second .
16. Frequencybis measured in
Hertz (Hz) 1Hz is 1 wave per second
17. All waves can be
Reflected refracted or diffracted
18. Reflection of light lets us
See things
19. ReflectionReflection of light is what allows us to see things light bounces off them into our eyes . When light travelling in the same direction reflects from an uneven surface such as a piece of paper , the light
Reflects off at different angles
20. When light travelling in the same directionreflects from an even surface (smooth and shiny like a mirror) then it's all
Reflected at the same angle and you get a clear reflection
21. What is the normal
It is an imaginary line that is perpendicular to the surface at the point of incidence (where the light hits the surface)
22. The law of reflection is
The angle of incidence = the angle of reflection

### Card Set Information

 Author: Anonymous ID: 150683 Filename: GCSE Physics Updated: 2012-04-28 17:01:25 Tags: use waves communication provide evidence that univers expanding Folders: Description: Part one Show Answers:

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