Waves can transfer __________ and information without a net __________ of the medium through which they travel.
They involve ____________ (oscillations) of some sort.
What is amplitude?
wave speed (meters per second) = frequency (Hertz) × wavelength (meters)
Calculate the speed of a wave.sound wave with a wavelength of 0.65 m and a frequency of 512 Hz.
Describe the changes in wavelength, frequency and speed of a wave when it is reflected.
The electromagnetic spectrum is made up of 7 different types of radiation. In order of increasing frequency, these are:
1. Radio waves
4. ____________ ___________
Ultraviolet, X-ray and gamma radiation can be described as ionising radiation.
What does ionising radiation mean?
What is a geosynchronous satellite?
What is a geostationary satellite?
Why do communications satellites need to have a geostationary orbit?
Why do communications satellites use microwave radiation to transmit information?
How long would it take a TV signal reach a satellite dish on your house roof, after the signal has been broadcast from a TV transmitter on Earth to a communication satellite in orbit 36,000 km above the Earth?
(All electromagnetic waves travel at 300,000 km/s in a vacuum)