Why is it important that glass mirrors used in astronomical observatories be composed of glass with a low “coefficient of expansion”?
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ANSWER: Coefficient of expansion tells us about the increase in length, width and height of different substances when heat is supplied to them. If it is less, then the expansion will be less after getting heated. In astronomical observatories, people look for very high energetic rays which may increase the the dimensions of the telescopes by the expansion due to temperature increase. In summer also the expansion in some random direction can occur for telescopes due to the extreme heat. In winter the same thing can happen but as a result of contraction. Once the dimension of the telescope’s glasses will change, the information we are getting could become extremely incorrect. So, we use the glass with very less coefficient of expansion.
Textbook: Conceptual Physics
Author: Paul G. Hewitt
The answer to “Why is it important that glass mirrors used in astronomical observatories be composed of glass with a low “coefficient of expansion”?” is broken down into a number of easy to follow steps, and 21 words. The full step-by-step solution to problem: 36E from chapter: 15 was answered by , our top Physics solution expert on 04/03/17, 08:01AM. This full solution covers the following key subjects: Glass, important, composed, Expansion, astronomical. This expansive textbook survival guide covers 45 chapters, and 4650 solutions. Conceptual Physics was written by and is associated to the ISBN: 9780321909107. Since the solution to 36E from 15 chapter was answered, more than 753 students have viewed the full step-by-step answer. This textbook survival guide was created for the textbook: Conceptual Physics, edition: 12.