Waves Basic Flashcards
What are waves and what do they carry?
Know that waves are disturbances that carry energy but not matter
What does frequency mean?🌊⏱🌊⏱🌊⏱
Number of waves per second measured in hertz (Hz)
λ
Wavelength measured in m (metres)
Velocity
Wave speed measured in m/s
A
Amplitude measured in m
How tall it is
T
Time period measured in s
Which bit of the wave is the amplitude and which bit is wave length?
\_\_\_ \_\_\_
/ \ / -a- \
------------------------
\\_\_\_/ \_^b_/A = wavelength
B= amplitude
LONGITUDINAL WAVES
Defination
LONGITUDINAL WAVE THE OSCILLATIONS ARE PARALLEL TO THE DIRECTIONS OF WAVE TRAVEL
TRANVERSE WAVES
Defination
TRANVERSE WAVE THE OSCILLATIONS ARE PERPENDICULAR TO THE DIRECTION OF WAVE🌊 TRAVEL🧳
Perpendicular
Transverse
Parallel
Longitudinal
Examples of transverse waves
Examples of these waves are: vibrations in strings, ripples on water surface and electromagnetic waves
Electromagnetic waves=
- radio waves
- micro-waves
- visible light
- ultra violet
- x-rays
- gamma rays
Examples of longitudinal waves?
Sound waves
Whats the wave equation
V = f x λ V
f λ
Whats the equation for time period
T = 1/f
F = 1/t
What equation do u use to find the speed of sound or ripples in a water?
Speed = distance/time
What simple methods do you use to create a wave easily so u can meausre it?
Use a tray filled with water
Tip the tray to create a wave
Time how long it takes for the wave to travel to the length of the tray and back again
Wave gets slower when its shallower
What simple method could u use to measure speed of sound
Signal your friend to bang the two blocks together hard🍳. Start the stopwatch⏱ as soon as you see the blocks hit each other. Press stop as soon as you hear the sound🗣 from the blocks. Calculate the speed of the sound by dividing the distance between you and your friend by the elapsed time.
How to simply create a ripple
Use a ripple tonic
Tray filled with water
The dipper goes up and down causes ripples
