Lesson 2: Optical Instruments
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Science in Action 8
Read pages 181 to 191 of your textbook and make notes in your notebook.
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The behavior of light has fascinated people for such a long time. Another human fascination with technology soon combined with knowledge of light to give us some tools to extend our abilities. The microscope and the telescope are both based upon the basic properties of light. Of course their function is very different. The microscope letting us see things that are far too small for the human eye. The telescope lets us see things that are really too far away to see well. This section will examine these optical instruments and their effect on our work with light.

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Using your text or an encyclopedia, define each of the following terms:
concave
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objective lens
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refracting telescope
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convex
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eyepiece lens
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reflecting telescope
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prism
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microscope
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objective mirror
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Exercise 1.2: Telescopes and Microscopes
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