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P1.5 Waves
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- 1What two things can we transfer in waves?Energy and information.
- 2What are the two types of waves and give examples.-Mechanical waves- Waves which must travel through a medium, such as sound waves, water aves, waves on springs ect.
-Electromagnetic waves- Waves that don't need to travel through a medium (can travel through a vacuum), infrared, radio waves ext. - 3What is a transverse wave?It's a wave where points on the wave move the oscillations move up and down or side to side perpendicularly to the direction it's moving.
- 4All vibrations on a transverse wave are --- to the direction of which the wave transfers energy.perpendicular
- 5What's a longitudinal wave?The vibrations of the longitudinal wave are parallel to the direction in which the wave is travelling <-->
- 6What type of wave are electromagnetic waves?Transverse
- 7What type of wave are mechanical waves?They can be either transverse or longitudinal.
- 8Define FrequencyIt's the number of wave crests past a fixed point every second (measured in hertz, Hz)
- 9Define wave speedIt's the distance travelled by a wave crest every second (m/s)
v = f * (labda)
Wavespeed=frequency*wavelength - 10Draw and label the points on a transverse wave. (5 labels)
- 11What does a bigger amplitude mean?It means the wave is carrying more information.
- 12When measuring the incident and reflection rays, do you measure between the ray and the place mirror or the normal?The normal
- 13Use three word to describe the image produced in the mirrorVirtual, inverted and upright
- 14Define refractionRefraction is the bending (change of direction) of a wave when it enters a medium where it's speed is different.
- 15In refraction, how does the ray change diffraction when going from: Air ---> Glass Glass ---> AirAir -> Glass = The ray refracts closer to the normal (so the ray of refraction is less than the ray of incidence)
Glass -> Air = The ray refracts further away from the normal (So the ray of refraction is more than the ray of incidence) - 16Define diffractionThe spreading of waves as they move through a gap or past obstacles.
- 17What causes the waves to diffract more?A smaller gap.
- 18With sound waves, what does increasing the amplitude and frequency do?-Increasing amplitude will make it louder volume.
-Increasing frequency will increase it's pitch.
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- GCSE Physics Fichas sobre P1.5 Waves, creado por Emily Treloar el 06/04/2016.
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- Emily Treloar
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