Physics Flashcards
(28 cards)
what type of waves are light waves?
- electromagnetic wave
how does light travel?
- through a vacuum
- through mediums
what is a medium?
- air
- water
-glass
what is the speed of light?
- 300,000km/s in a vaccuum
what determines the colour of light?
- different wavelengths
-different frequencies
what is the visible spectrum of light?
- red to violet
what type of waves are sound waves?
- mechanical waves
how does sound travel?
- through a medium
why can’t sound travel through a vaccum?
- there’s no medium to carry the vibration
how fast does sound travel?
- 343m/s in air
what is frequency in sound?
- the pitch of the sound
what is amplitude?
- the actual physical wave of loudness
what is volume?
- how loud we hear the sound
what is the human hearing range?
20Hz - 20,000Hz
what is amplitude?
the maximum height of the wave from the equilibrium
what is wavelength?
the distance between two troughs/crests
what is the crest?
the highest point on a wave
what is the trough?
the lowest point on a wave
the is the frequency?
the number of wavelengths/second
what is the period?
the time taken for one complete wavelength
what is displacement
how far a point on the wave has moved from the equilibrium
what is the formula for calculating period or frequency?
T = 1/f which is f = 1/T
what is the distance from the equilibrium to crest called?
max positive displacement
what is the distance from the equilibrium to trough called?
max negative displacement
