Question

Q-3 Read about how a telescope is made and make a list of lenses and mirrors

used in making a powerful telescope. Use pictures or diagrams to explain your

point. (05)​

Answer 1

A telescope is a tool that astronomers use to see faraway objects. Most telescopes, and all large telescopes, work by using curved mirrors to gather and focus light from the night sky.

The first telescopes focused light by using pieces of curved, clear glass, called lenses. So why do we use mirrors today? Because mirrors are lighter, and they are easier than lenses to make perfectly smooth.

The mirrors or lenses in a telescope are called the “optics.” Really powerful telescopes can see very dim things and things that are really far away. To do that, the optics—be they mirrors or lenses—have to be really big.

The bigger the mirrors or lenses, the more light the telescope can gather. Light is then concentrated by the shape of the optics. That light is what we see when we look into the telescope.

The optics of a telescope must be almost perfect. That means the mirrors and lenses have to be just the right shape to concentrate the light. They can’t have any spots, scratches or other flaws. If they do have such problems, the image gets warped or blurry and is difficult to see. It’s hard to make a perfect mirror, but it’s even harder to make a perfect lens.

Lenses

A telescope made with lenses is called a refracting telescope.

A lens, just like in eyeglasses, bends light passing through it. In eyeglasses, this makes things less blurry. In a telescope, it makes faraway things seem closer.

Please mark as brainiest if this answer helped you.