Question

explain the construction of newtonian telescope

Answer 1

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Answer 2

Explanation:

The Newtonian reflector is a classic mirror telescope design, and Isaac Newton first built this telescope in 1668. ... This is a plane mirror that deflects the light beam by 90°, thus directing it out the side of the tube. The light enters the focuser here, into an eyepiece that can be inserted for observation

Isaac Newton built his reflecting telescope as a proof for his theory that white light is composed of a spectrum of colours. He had concluded that the lens of any refracting telescope would suffer from the dispersion of light into colours (chromatic aberration)

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