Electromagnetic Spectrum Flashcards
What type of waves are EM waves
Radio waves
What is the speed of all EM waves in a vacuum
3 x 10^8 m/s
What can be used to split white light
A prism
How was infrared discovered
Sir Frederick William Herschel in 1800 decided to measure the temperature of each colour
What happens to frequency and energy as the wavelength becomes shorter
They increase
What are radio waves used for
To transmit signals
What are microwaves used for
Satellite communications and cooking food
What is infrared used for
Heating, cooking and TV remotes
What is visible light used for
So we can see
What is ultraviolet used for
Tanning salons
What is X-ray used for
To see bones, it is used in hospitals
What are gamma rays used for
To kill cancer cells
Are EM waves transverse or longitudinal
Transverse
How are radio waves produced and transmitted
They are encoded and sent from a transmitter to a receiver where it will be decoded and made a normal sound
