Use the dictionary if you find a word you do
not
understand or is not in the glossary!
Encyclopedia comes first on the page you will
go to.
Scroll down the page until you find "dictionary".
Click on the book to go to a dictionary
Use the dictionary if you find a word you do
not
understand or is not in the glossary!
Encyclopedia comes first on the page you will
go to.
Scroll down the page until you find "dictionary".
Click on the book to go to a dictionary
| light | Noun | something that makes vision possible | |
| reflection | Noun | a. the return of light or sound waves from a
surface
b. the production of an image by or as if by a mirror |
|
| refraction | Noun | Change light's direction by making it pass into another transparent material of different density, like glass or water. |  |
| periscope | Noun | a tubular optical instrument containing lenses and mirrors by which an observer obtains an otherwise obstructed field of view |  |
| mirror | Noun | a reflecting surface that forms an image of an object | |
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