1.) TRANSPARENT – Objects which allow ALL light to pass through.
OTHER EXAMPLES - window glass, drinking glass
2.) TRANSLUSENT – Objects which allow SOME light to pass through.
OTHER EXAMPLES - stained glass windows, wax paper
3.) OPAQUE - Objects which allow NO light to pass through; cast shadows
OTHER EXAMPLES – PEOPLE, TREES, BUILDINGS
4.) LUMINOUS - Objects which produce their OWN source of light.
The sun the light in the lighthouse stars
5.) ILLUMINATED - Objects which reflect light from another source.
OTHER EXAMPLES – books, people, tables, etc.
***LIGHT is a TRANSVERSE WAVE
***LIGHT needs NO medium to travel on, therefore, you CAN SEE IT in
outer space!
***LIGHT travels in a straight line; it will not bend!
***LIGHT WAVES travel FASTER than SOUND WAVES!
YOU NEED TO KNOW THE ELECTOMAGNETIC SPECTRUM!
***Electromagnetic energy – both VISIBLE and INVISIBLE
***Lowest frequency / longest wavelength – RADIO WAVES
***Highest frequency / shortest wavelength – GAMMA RAYS
(highest energy)
***VISIBLE LIGHT – the colors of the “rainbow”
-REMEMBER – ROY G BIV
OTHER EXAMPLES - window glass, drinking glass
OTHER EXAMPLES – PEOPLE, TREES, BUILDINGS
The sun 
the light in the lighthouse 
stars