P13 Electromagnetic spectrum Flashcards
What is a source of radio waves?
Sun, radio, TV.
What is a source for microwaves?
Satellite communication, sun, microwave oven.
What is a source for Infrared radiation?
Sun, infrared camera.
What is a source for visible light?
Filament lamp, sun.
What is a source for ultraviolet?
UV lights, sun.
What is a source for x-rays?
X-ray machines, x-ray camera, sun.
What is a source for gamma rays?
Gamma camera, sun.
What effects do radio waves have on the body?
None.
What effect do microwaves have on the body?
None.
What effect does infrared radiation have on the body?
If skin gets too hot can burn.
What effect does visible light have on the body?
Blindness.
What effect do x-rays have on the body?
Cell damage.
What effect do gamma rays have on the body?
Can treat cancer, damages cells.
What can radio waves be used for?
Watching TV, listening to a radio.
What can infrared radiation be used for?
Night vision cameras.
What can visible light be used for?
Vision.
What can ultraviolet be used for?
Fluorescent lamp.
What can x-rays be used for?
Airport luggage, x-ray machines, x-ray camera.
What can gamma rays be used for?
Treating cancer, damaging cells, sterilising medical equipment.
What is a main use for radio waves?
TV.
Why is the sun a source for all the electromagnetic waves?
Sun is a black body.
How do x-rays work?
Electrons hit metal plate, kinetic energy transferred into x-rays.
How is an x-ray image produced?
X-ray image produced by detector under conveyor belt, detector collects x-rays not stopped by object.
What are the advantages of x-rays?
Can image internal structure of body (non-invasive(no surgery required)).
What are the disadvantages of x-rays?
Can cause cancer.
Can’t image soft tissue.
Can cause cell damage.
