Properties of light, the human eye, color & vision

Sources of Light Sunlight- light radiates from sun. The nuclear _______ of hydrogen atoms creates the light and heat for us on the earth. Radiate means to spread out from the ________. We call all light _______ energy. fusion center radiant

Sources of Light Electrical Light Bulb Incandescent light – this type of light bulb is created from a _______ tungsten filament. Light Emitting diode –is currently the most popular type of light bulb and is made with a _______________. We commonly refer to these as LED lights. glowing semi-conductor

How Light Passes Through Materials TRANSPARENT: most light is transmitted (passes through), objects can be seen clearly EX. air, water, clear glass TRANSLUCENT: transmits some light, but objects cannot be seen clearly EX. lampshades, frosted windows, curtains OPAQUE: does not allow any light to pass through; object absorbs all of the light EX. wood, rock, metal opaque translucent transparent

How Light Passes Through Materials . MATERIAL DESCRIPTION 3 EXAMPLES TRANSPARENT TRANSLUCENT OPAQUE

VISBIBLE LIGHT SPECTRUM VISIBLE LIGHT IS MADE UP OF 7 DIFFERENTWAVELENGTHS: RED ORANGE YELLOW GREEN BLUE INDIGO VIOLET Now take time to play around with prisms. Tilt chin downwards. Slowly tilt prism up until you see the “rainbow” ***Memory technique: ROY G BIV

Website about colored lights Play around with colored card stock and colored light bulbs if they come in by Wednesday. Go to http://www.scifun.ed.ac.uk/pages/exhibits/ex-colour-box.html Website about colored lights