Light and Sound MTA COPY Flashcards
Light and Sound Mid Topic Assessment (35 cards)
How does increasing a sound waves amplitude effect the sound?
The volume increases.
What is Wavelength?
The length of one wave, from peak to peak or trough to trough.
What is frequency measured in (the units)?
Hz, Hertz
What will a wave with a high frequency sound like?
High pitched.
What will a wave with a low frequency sound like?
Low pitched.
What is it called when a sound wave gets reflected?
Echo
Why are Echo’s always quieter than the original noise?
Some of the sound waves energy is absorbed into the surface of the material that the wave is bouncing off.
What is echo location?
Using the time it takes an echo to be received to calculate the distance from a surface.
Through which state does sound travel fastest?
Solid.
Why does sound travel faster in water than in air?
The particles in water are closer together so it takes less time for each particle to transfer its energy to the next one.
Name the 2 types of wave.
Transverse, Longitudinal
In what direction do the particles oscillate in a transverse wave?
At 90 degrees to direction of the wave.
In what direction do the particles oscillate in a Longitudinal wave?
Parallel to the direction of the wave.
What type of wave is a sound wave?
Longitudinal
What causes a sound wave?
A vibration
Why cant a sound wave travel through a vacuum?
There are no particles to transfer the energy.
What do all waves transfer?
Energy
What is the speed of sound in air?
340 m/s
Why do you see the flash of a firework before you hear the BANG!?
Light travels much faster then sound.
Which part of the ear moves first when receiving a sound wave.
The ear drum.
What is an echo?
A reflected sound wave.
What is ultra sonic?
A sound with a frequency above 20 000 Hz
What equation can you use to find the distance a sound wave has travelled?
Speed (m/s) = Distance (m) / Time (s)
Describe a low pitched loud sound wave.
A wave that has a large amplitude and a low frequency.
