Light And Sound Flashcards
What is a transverse wave
A transverse wave is a water wave or light waves.
What is a longitudinal wave
A longitudinal wave is a sound wave.
What is frequency measured in
Herz (Hz)
What is frequency
The number of waves produced in 1 second.
What does the height of a wave indicate
The loudness of the wave. Eg. Small is quiet.
What is the height of the wave called and what is it measured in.
The amplitude is measured in mm, cm, m.
What does sound travel better through
A solid, because the particles are closer together so the vibrations are passed on quicker.
What is the human hearing limit
20 kilo hertz or 20000 hertz
A fish’s hearing can reach up to….
1,000 hertz
Can sound travel through a vacuum.
No, because there are no particles to pass on vibrations.
What is ultrasound
A sound above the human hearing limit 20000 hertz. It can measure the speed of blood flow, investigate hert problems and break down kidney stones.
What speed do light and sound travel at.
Light travels at 300,000,000 metres per second and sound travels at 330 metres per second.
What is a normal.
A perpendicular (90°) line to the surface. All Angles are measured from the normal.
What is the focal length.
The distance between a lens or a mirror and where the light focuses.
What is a spectrum.
White light split up into the colours of the rainbow. Often formed when white light is shone through a prism.
