Question

Optical device which gathers and focuses light using convex lenses

Answer 1

The optical device that gathers and focuses light using convex lenses is called a **telescope**. Telescopes are designed to observe distant objects by collecting more light than the human eye can and magnifying the images of those objects. There are various types of telescopes, including refracting telescopes that use convex lenses to bend and focus light, and reflecting telescopes that use mirrors. In each case, the principle of focusing light to create a clearer and more magnified image is vital for astronomical observations.