Electromagnetic Spectrum Flashcards
What is wavelength?
The length of a full cycle
What is amplitude?
Distance between the rest position and crest
What is frequency?
Number of complete waves per second
What is the unit for frequency?
Hz
Give an example of a transverse wave
Light and all other electromagnetic waves
What is a longitudinal wave?
Vibrations along the same line
Give an example of a longitudinal wave
Sound waves
Ultrasound
Give two properties of all electromagnetic waves
Transverse Same speed (through air)
What is the equation for wave speed?
Speed = frequency x wavelength
What is the unit for speed?
M/s
What is the unit for wavelength?
M
What is the rule for reflection?
Angle of incidence = angle of reflection
What is refraction?
Ray goes through a material and changes direction
What is diffraction?
All waves diffract at the edges when passing through a gap or an obstacle
What happens hen a wave goes through a gap much wider than it’s wavelength?
Little diffraction