Flashcards
Waves 9-1 physics
Flashcards do conjunto (17)
- 1What do waves do?Transfer energy from one place to aother
- 2What is a: -transverse wave -longitudinal wave-Transverse: Has perpendicular oscillations to the direction of energy transfer
-Longitudinal: Oscillations are parallel to the direction of energy transfer - 3What are the definitions of: - frequency - amplitude - wavelength - period- frequency: the number of waves passing a fixed point per second (hertz, Hz)
- amplitude: the maximum displacement that any particle achieves from its undisturbed position in metres
- wavelength: the distance from one point a wave to the equivalent point on the next wave in metres
- period: the time taken for one complete oscillation in seconds - 4What is the equation for the period?period= 1 ÷ frequency
T= 1 ÷ f - 5What does amplitude implicate?The amount of energy a wave is carrying- the more energy, the higher the amplitude
- 6What is the equation for wave speed?wave speed= frequency x wavelength
v= f λ - 7What type of wave is an electromagnetic wave?Transverse wave
- 8What speed do all EM waves travel at?They all travel at same velocity (the speed of light) in air or a vacuum
- 9What does the wavelength of an EM wave affect?How it's absorbed, transmitted, reflected or refracted by different substances. This affects its uses.
- 10What does the direction of refraction depend on?- the angle at which the wave hits the boundary
- the materials involved - 11For light waves, what is the way in which a material affects refraction is called?The refractive index
- 12What happens to the refractive index when light travels from a material with a: - low refractive index to a high refractive index? - a high refractive index to a low refractive index?- low refractive index to a high refractive index: it bends TOWARDS the normal
- a high refractive index to a low refractive index: it bends AWAY from the normal - 13What is the cause of refractionRefraction is due to the difference in the wave speed in the different media
- 14What happens when a light wave enters, at an angle, a medium in which it travels slower?1. the first part of the light wave to enter the medium slows down
2. the rest of the wave continues at a higher speed
3. this causes the wave to change direction, towards the normal - 15What can ray diagrams be used to show?A wave reaching a boundary between one medium (material) and another, then being refracted
- 16When are ray diagrams used?To show how light moves from one place to another
- 17What a ray diagram looks like:
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- GCSE Physics (P2 Waves) FlashCards sobre Waves 9-1 physics, criado por Amelia Quinn em 22-02-2018.
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- Amelia Quinn
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