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Which property of concave mirror is used in telescope?​

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Answer: reflection

Explanation: the concave mirror will gather light from distant objects outside of the Earth's atmosphere. since these celestial objects are so far, the rays of light are parallel, and the mirror will reflect it at the focus point, and the image displayed depends on how far away the object is.

User Dmitry Gusarov
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  • Concave mirrors are widely used in different reflecting telescopes in observational astronomy. The concave mirror in a reflecting mirror collects the light from distant celestial objects. Since the light sources are very far away, the incoming light rays are effectively parallel.
User Pkis
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