SP5 Flashcards
What has to happen in order for light to pass along the interface
angle of incident equal to critical angle
What has to happen in order for light to total internally reflect
angle of incident greater and critical angle
What is diffuse reflection
materials have rough reflected light scattered in al directions
What is specular reflection
reflect light evenly
Describe a converging lense
-light come together at focal point
Describe a diverging lens
light spread outwards
What is infrared used for
communication- short range, TV
What are microwaves used for?
communication with satellies, phones
What are radio waves used for
transmitting radio bradacst and TV stations
How are radio waves produced
oscillations in electrical circuits
-RW cause oscillating current in receiving aerial
What is ultraviolet used for
disinfect water, fluorescent lamps
What are x-rays used for
x-rays bc bone absorbes x ray waves
