Electromagnetic Wavelength Flashcards
What is the electromagnetic spectrum in decreasing order of wavelength?
RadioWaves MicroWaves Infared Visible Light UltraViolet X-Ray Gamma
Which wave has the highest frequency?
Gamma
What speed do they travel in a vacuum?
300,000,000 metres per second
Do high frequency electromagnetic waves transfer more or less energy?
High energy
What term is used to describe light from lamps and the sun?
Ultraviolet
What are uses of infared radiation?
Thermal imaging cameras
Heaters
Cookers
Why are microwaves used for satellite TV?
They can pass through the atmosphere
Why do microwaves heat food faster than a normal oven?
Microwaves directly heat the food where as ovens heats the surroundings and then that heats the food
Why are microwaves and RadioWaves hazardous?
Can cause painful burns… Microwaves can heat the body’s tissues like they would food
What determines the types of waves used to carry signals?
Depends on the frequency
Compare optical fibres to RadioWaves?
Radio links is higher than fibre optic connections
Which EM waves are ionising?
Ultraviolet
X-Rays
Gamma
