1.2) Waves of energy Flashcards
What is a vacuum?
Space
Can sound travel through a vacuum? Why or why not?
No, sound cannot travel through a vacuum because there is no free matter and no medium for it to pass through
What are the three properties of a wave?
- Frequency
- Wavelength
- Amplitude
Can light travel through a vacuum? Why or why not?
Yes, light can travel through a vacuum because it does not require any medium
What is frequency?
Frequency is the number of vibrations per second
How is frequency measured?
Frequency is measured in hertz (Hz)
What is frequency related to?
Frequency is related to the pitch of the sound
The higher the frequency the higher the ______.
Pitch. This is because high-frequency waves carry more energy
What is wavelength?
Distance between successive peaks
How is wavelength measured?
Wavelengths are measured in metres
A wave with _______ wavelength carries more energy than a wave with a ______ wavelength
A wave with shorter wavelength carries more energy than a wave with a longer wavelength
What is the symbol for wavelength?
Lambda λ
What is amplitude related to?
The loudness of sound
The _______ the amplitude the louder the sound
The higher the amplitude the louder the sound
A wave with a ______ amplitude carries more energy than a wave with a ______ amplitude
A wave with a high amplitude carries more energy than a wave with a low amplitude
What is a longitudinal wave?
A longitudinal wave is a mechanical wave where particles vibrate in the same direction as the wave
What is an example of a longitudinal wave?
Sound wave, tsunamis, earthquakes
What are longitudinal waves made up of?
Longitudinal waves are made up of compressions and rarefactions
Where are compressions?
Compressions are where the particles are bunched up or compressed
Where are rarefactions?
Rarefactions are where the particles are stretched apart
Does sound travel faster through solid, liquid, or air?
Sound travels fastest through solids because the molecules of a solid are closer together and can transmit vibrations (energy) faster
What are some examples of transverse waves?
Strings in musical instruments, ocean waves, light
Do transverse waves need a medium to move through?
Transverse waves may or may not need a medium to move through
At what angle do transverse waves vibrate?
Transverse waves vibrate at right angles to their direction of motion
How do the particles vibrate in a transverse wave?
They move up and down
Formula to find speed
Wavelength x Frequency
λ x f
Formula for frequency
Speed ÷ wavelength
V ÷ λ
Formula for wavelength
V ÷ f
