Question : Which telescope was invented by Isaac Newton in the 17th century by using a concave mirror to collect light instead of a simple lens, which produces false colours due to the dispersion of light?
Option 1: Reflecting telescope
Option 2: Infrared telescope
Option 3: Monocular telescope
Option 4: Graphic telescope
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Correct Answer: Reflecting telescope
Solution : The correct option is a Reflecting telescope .
Isaac Newton is credited with inventing the reflecting telescope in the 17th century. The reflecting telescope uses a curved mirror, typically a concave mirror, to collect and focus light. This design was innovative because it helped reduce the problem of chromatic aberration, which is the dispersion of light that causes false colours in images produced by lenses.
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