Answer:
The objective itself is usually a cylinder containing one or more lenses that are typically made of glass; its function is to collect light from the sample.
Explanation:
A telescope mirror can be made from glass that is somewhat less pure than that used to make a lens, since light does not pass through it.
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Answer:
air masses cooling as they increase in altitude and condense
Answer:healthy plants
Explanation:the farmers use raw manure on their fields because it is an excellent source of nitrogen (N), phosphorus (P) and potassium (K), which are all nutrients necessary for plants to grow and thrive.