Question

Li
a
10. Read the following and answer any four
questions from 10 (i) to 10 (v).
Anuj wanted to see the stars of the night sky.
He knows that he needs a telescope to see
those distant stars. He 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, he decided to make a
refracting telescope. He 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.
10(1). Based on the diagram shown, what kind of lenses would Anuj need to make the
telescope?
(1.)
a) Concave lenses
b) Convex lenses
c) Bifocal lenses
d) Flat lenses
1niIf the powers of the lenses L1 and L2 are in the ratio of 4:1, what would be the ratio of​

Answer 1

Answer:

I think its concave lenses