Electromagnetic spectrum Flashcards
List the waves of the EM spectrum in order of increasing frequency.
Radio/TV waves
Microwaves
Infrared
Visible light
Ultra-violet light
X-rays
Gamma rays
List the waves of the EM spectrum in order of increasing wavelength.
Gamma rays
X-rays
Ultra-violet light
Visible light
Infrared
Microwaves
Radio/TV waves
How fast do all waves in the EM spectrum travel?
The speed of light:
3 x 10⁸ m/s
(300,000,000 m/s)
Give a source, application and detector of gamma rays.
Source - nuclear decay
Application - treat cancer, sterilise medical equipment
Detector - geiger muller tube, photographic film
Give a source, application and detector of X-rays.
Source - X-ray machine
Application - X-rays of bones, radiotherapy
Detector - photographic film
Give a source, application and detector of UV light.
Source - the Sun
Application - security markings, treating skin conditions
Detector - fluorescent materials, photodiode
Give a source, application and detector of visible light.
Source - the Sun, LEDs
Application - photography, laser surgery
Detector - eyes, LDR, photographic film
Give a source, application and detector of infrared.
Source - warm objects, IR LEDs
Application - night vision goggles, remote controls, thermograms
Detector - photodiode, heat-sensitive papers, black-bulb thermometer
Give a source, application and detector of microwaves.
Source - electronic circuits, stars, microwave transmitters.
Application - mobile phones, wifi, radar, heating food.
Detector - aerial.
Give a source, application and detector of radio waves.
Source - radio transmitters in electronic circuits.
Application - communications, radio, TV.
Detector - aerial.
Name a hazard of UV light.
Sun burn
Skin cancer
Cataracts
Name a hazard of X-rays and gamma rays.
Cell mutations that can cause skin cancer.
Name a hazard of infra-red.
Thermal burns.
Name a hazard of microwaves.
Internal heating of body tissue.
What type of EM spectrum wave is produced by a laser?
Visible light.
The colours of the visible spectrum are red, orange, yellow, green, blue, indigo, violet.
What happens to the wavelength when moving from red to violet?
The wavelength is decreasing going from red to violet.
Name a hazard of gamma rays.
Cell mutation that can lead to cancer.
