Flashcards
Chapter 6 Waves, Sounds and vibrations
Flashcards do conjunto (16)
- 1What are transverse waves?vibrations travel perpendicular to the direction of travel
- 2What are longitudinal waves?Vibrations are parallel to the direction of travel
- 3Give some examples of transverse and longitudinal wavesTRANSVERSE:
light
x-rays
microwaves
LONGITUDINAL:
Sound - 4What is the frequency?The number of waves passing any point per second
If 4 waves pass any point per second then the frequency is 4Hz - 5What is the period?The period is the time for one oscillation
It is equal to 1/frequency - 6What is the wavelength?The wavelength is the distance between any point on a wave and the equivalent point in the next.
- 7What is the amplitude?The amplitude is the maximum distance a point moves from its rest position when a wave passes,
- 8What is the wave equation?speed= frequency x wavelength
- 9What can a ripple tank be used for?Ripple tanks can be used to study the properties of waves
Ripples are sent across the surface of the water, obstacles are put in their path to see what effects are produced - 10What is reflection?A vertical surface is put in the path of the waves. The waves are reflected from the surface at the same angle as they strike
- 11What is refraction?A flat piece of plastic makes the water shallow, which slows the waves down. When the waves slow they change direction
- 12What is diffraction?The waves get into the space behind the obstacle. it is most obvious when the gap is about the same size as the wavelength.
- 13What is a medium? Why is it important?Sound waves need a material to travel through. This material is called a medium. Without it, there is nothing to pass on any oscillations, sound cannot travel through a vacuum
- 14What is the connection between pitch and frequency?We hear high frequencies as high notes or having a high pitch
We hear low frequencies as low notes or having a low pitch - 15What is the connection between loudness and amplitude?The bigger the amplitude the louder the sound
The smaller the amplitude the quieter the sound - 16What are echo-sounders used for and how do they work?1- a sound is sent down
2- the sound is reflected off the bottom
3-the boat receives the sound back and a computer works out the depth
Informações
- Descrição
- Cambridge IGCSE and GCSE Science (Physics) FlashCards sobre Chapter 6 Waves, Sounds and vibrations, criado por Millie Berrett em 02-01-2015.
- Criado por
- Millie Berrett
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