Wave Perameters And Behaviours Flashcards
What is the definition of wavelength
The length of 1 wave
What is the unit of wavelength
Metres
What is the definition of amplitude
The height measured from crest to axis (middle)
The greater the waves energy the…
Greater the amplitude
How can you calculate the speed of a wave
D = V x T
What is the speed of light in air
3x10 to the power of 8 ms-1
What is the speed of sound in air
340ms-1
What are some examples of light travelling faster than sound
Fireworks and thunder and lightning
Describe an experiment used to calculate the speed of sound
Set two microphones a metre apart from each other with a timer attached. Then play a noise behind microphone 1 and see how long it takes the sound to reach microphone 2. When the noise reaches microphone one the start the timer and wind noise reaches microphone to the stop the timer. Then measure the distance between the two microphones and use V equals D/T.
What is another way of calculating speed of a wave
V = f λ
What is the definition of the period of a wave
The time taken for one complete wave to occur
How do you calculate period
T = 1/f
What is the unit of period
Seconds
What is the definition of a longitudinal wave
Away for particles vibrate in the same direction as the wave
What is an example of a longitudinal wave
Sound
What is the definition of a transverse wave
A wave where particles vibrate at 90° to the direction of travel
What are examples of transverse waves
Light and water
What is diffraction
Diffraction is where waves bend around an obstacle
Larger the wavelength the…
Easier it will diffract
Why will radio waves be received better in hilly regions then TV waves
Because they have a longer wavelength
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Does a wave with a short wave length diffract more than a wave with a long wavelength
No
