Optics
Crossword
Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Click on a number in the grid to see the clue or clues for that number.
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Check
Across:
1.
Images are formed behind the retina, not on it, and this causes close-up images to be blurry
3.
A type of optical telescope that uses a lens as its objective to form an image
4.
The lens in a telescope focuses the light to a point in front of the eyepiece
5.
Another word for nearsightedness
Down:
2.
An optical telescope which uses curved mirrors that reflect light and form an image
OK