Question

Which metal is used for making concave mirrors for astronomical telescopes?
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Answer 1

Answer:

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✏The reflective coating for telescope mirrors is usually made from aluminum, and the protective coating on top of the reflective coating is usually composed of silicon dioxide.

✏Hardware components that are directly involved with the optical system are usually manufactured from steel or steel and zinc alloys.

Explanation:

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Answer 2

Answer:

Aluminium is your answer bro ?

Explanation:

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