Sumati bought not-so-thick lenses for the telescope and polished them.

Read the following and answer any four questions.

Sumati wanted to see the stars of the night sky. She knows that she needs a telescope to see those distant stars. She finds out that the telescopes, which are made of lenses, are called refracting telescopes and the ones which are made of mirrors are called reflecting telescopes.

So she decided to make a refracting telescope. She bought two lenses, L1 and L2. out of which L1 was bigger and L2 was smaller. The larger lens gathers and bends the light, while the smaller lens magnifies the image. Big, thick lenses are more powerful. So to see far away, she needed a big powerful lens. Unfortunately, she realized that a big lens is very heavy.

Heavy lenses are hard to make and difficult to hold in the right place. Also since the light is passing through the lens, the surface of the lens has to be extremely smooth. Any flaws in the lens will change the image. It would be like looking through a dirty window.

Sumati bought not-so-thick lenses for the telescope and polished them. What advantages, if any, would she have with her choice of lenses?

A. She will not have any advantage as even thicker lenses would give clearer images.
B. Thicker lenses would have made the telescope easier to handle.
C. Not-so-thick lenses would not make the telescope very heavy and also allow considerable amount of light to pass.
D. Not-so-thick lenses will give her more magnification.

Correct answer is option C. Not-so-thick lenses would not make the telescope very heavy and also allow considerable amount of light to pass.