light, a form of energy
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17 terms
Terms | Definitions |
|---|---|
 light | a form of energy that ALLOWS YOU TO SEE objects. |
| Earths sources of light | the sun is the main source; also fires and light bulbs |
| how does light travel | light travels in a STRAIGHT PATH until it hits and object |
| absorption | light is absorbed (or TAKEN IN) when it hits an object |
| reflection | light reflects when it BOUNCES OFFfobjects (bounces the same as a ball: hits the object and then goes in a different direction) |
| mirrors | smooth shiny surfaces that reflect almost all the light that hits it |
| when do you see an object | you see an object when light from the object reflects off of the object and it reaches your eye |
| opaque objects | they block light from passing through them so you CANNOT SEE THROUGH THEM (examples are brick walls, cardboard, even people) |
| shadow | a DARK SPACE that forms when light is blocked. The closer an object is to the light, the bigger the shadow is. |
| transparent | objects that ALLOW LIGHT TO PASS THROUGH them (air, glass and clear plastic) |
| translucent | objects that let light pass through them but SCATTER THE LIGHT so you cannot see clearly through it (wax paper and frosted glass, stained glass windows) |
| refraction | when light BENDS. it refracts when it passes from one material to another. (remember the bending light rays that make the pencil look broken when it is standing in a glass of water) |
| rainbows | when water vapor refracts, or bends, the sunlight, a rainbow forms. |
| prisms | a piece of GLASS THAT REFRACTS LIGHT. It separates white light into ALL of the colors that make it up by bending each color of light in a different amount |
| how do we see a leaf as green?? | when white light strikes the leaf, the leaf absorbs all of the colors EXCEPT for green. The green bounces off the leaf and the green is reflected into your eye |
| black objects | objects that ABSORBS ALL THE LIGHT that strikes it looks black (all of the color gets absorbed in the object, no color goes to your eye) |
| white objects | objects that REFLECTS ALL LIGHT that strikes it looks white (all colors reflect into your eye making it look white) white light is MADE OF MANY DIFFERENT COLORS |
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