Question

1. According to optical property, telescopes
are classified into
2) If the power of a lens is -0.2D, what
will be its focal length ?
3.The deviation in the path of light ray is Called
4)The first telescope was invented by
5.Astigmatism can be corrected by
and
6. and are applicable to thin lenses only
7.I D =
8. is also an elastic scattering
9. Angle of refraction is the smallest for​

Answer 1

Answer:

(2)  -5 meter ;  (3)  refraction of light

Explanation:

2) power=-0.2D,

F=?

F=1/P

F=1/-0.2

F=-5 meter