Mobile Communication Devices Flashcards
Which direction do particles move in longitudinal waves?
parallel to the direction of energy
Which direction do particles move in transverse waves
perpendicular to the movement of energy
Is energy or matter transferred in waves?
energy
define: medium
the material the wave travels through
define: frequency
The number of wavelengths that pass per second. Measured in hertz (Hz). This indicates pitch
define: wavelength
The distance of one wave (crest to crest or trough to trough)
define : amplitude
The magnitude of the pressure, indicated by the height of the wave. This indicates loudness.
What is another word for a sound wave?
‘compression wave’
Define: compression
a point of high pressure
Define: rarefaction
a point of low pressure
What is an electromagnetic wave?
electric and magnetic fields oscillating at right angles
Define: oscillating
vibrating regularly
State the formula for wave velocity
C=fλ, where C is the velocity, f is the frequency and λ is the wavelength
List the types of electromagnetic waves from lowest to highest frequency
radio waves, microwaves, infrared, visible light, ultraviolet, X-ray, gamma
State the law of reflection
angle of incidence = angle of reflection
