Question

Which optical instrument was invented by Isaac Newton?

Hint:

This instrument uses a curved mirror instead of a lens to gather light for viewing distant objects.

Answer 1

The answer is the reflecting telescope.

1. Before Newton, telescopes relied only on glass lenses, and these produced blurry, colored edges around images.
2. Newton figured out that a curved mirror could focus light without causing that color spreading.
3. In 1668 he built a working model using a mirror at the back of the tube and a small mirror to send the image to the eyepiece.
4. This type of telescope became known as the Newtonian telescope.

His invention is considered one of his major contributions to physics and astronomy, alongside his laws of motion and work on gravity.