Galileo had made improvements on the lens developed by the Dutch for use in telescopes,but the inventor of a new type of telescope employing a curved mirror instead of a lens was:

Question

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Isaac Newton invented a new type of telescope that used a curved mirror instead of a lens, known as the Newtonian telescope. This design allowed for a more compact telescope and reduced some of the optical distortions found in refracting telescopes.

Galileo Had Made Improvements on the Lens Developed by the Dutch