Waves Flashcards
Types of waves, electromagnetic spectrum ect
Name a transverse wave
Radio waves
Name a longitudinal wave
Sound waves
In a longitudinal wave, wave vibrations are _______ to the directions of motion
Perpendicular
In a transverse wave, wave vibrations are _______ to the wave direction
Parallel
What is the direction of the wave also known as?
Wave propagation
Wavelength
Distance between two waves
Amplitude
Height of a wave from the resting position
What does amplitude increase?
Volume
Bigger amplitude=More ____
Energy
Can sound waves travel through a vacuum? Why?
No, because they require a medium to travel through
Which state of matter do sound waves travel through thequickes?
Solids
What is human hearing range?
20 hz to 20,000 hz
What does ultrasound mean?
Beyond human hearing range
What does infrared sound mean?
Below human hearing range
How does the ‘clap’ method work?
Measuring the distance between the clap and the surface, and dividing it by the time taken to hear the echo., to get the speed of sound.
How is a datalogger more precise?
It removes human hearing time.
List the electromagnetic waves from longest wavelength to shortest.
Radiowaves, Microwaves, Infra-red, visible light, ultrasound, x-ray, gamma ray
Name 3 properties of electromagnetic waves
- They are transverse
- They transfer energy
- They travel at the same speed through a vacuum
Uses of radio waves
Broadcasting
Uses of microwaves
Spacecraft communication
Uses of infra-red
Electrical heaters
Uses of visible light
Illumination
Uses of ultraviolet
Sterilisation
Uses of x-rays
To see bone fractures
Uses of gamma rays
Tumour removal
Formula for frequency
1/time period or wave speed/wave length
Equation for wave speed
Frequency * Wave length
Industrial use of ultrasound
|Checking quality of materials
