In a transverse wave the oscillations are perpendicular to the direction of energy transfer
Transverse waves cannot travel through a vacuum
Frequency is measured in...
Ohms
Hertz
m/s
When light enters a more dense medium it is refracted
towards the normal
away from the normal
Waves are not refracted if they are travelling along the normal
Which are true?
Electromagnetic waves are transverse
Sound are transverse
Some waves transfer energy
In longitudinal waves, there are compressions and rarefactions
In longitudinal waves, there are compressions and expansions
Which are uses for microwaves?
remote controls
sterilising surgical instruments
mobile phones
satellite television
bluetooth
security marking
Long exposure to electromagnetic waves can cause serious damage to cells in our bodies
What is the range of human hearing?
200 - 20000 Hz
20 - 2000 Hz
20 - 200000
20 - 20000Hz
200 - 2000 Hz
When waves are reflected, the angle of incidence = angle of refraction
What is the normal?
A line parallel to the reflecting surface at the point of incidence
A line perpendicular to the reflecting surface at the point of incidence
A line diagonal to the reflecting surface at the point of incidence
The Doppler Effect is a change in the observed wavelength and frequency
