Question

2n-1
i.
A narrow parallel beam of light falls on transperent sphere of radius 'R' and refractive index 'n' at what
distance from the surface of sphere will the rays
be focused?
[ ]
R
(2-n)R
(4 – 3n)R
(2-n)R
a)
2(n-1)
b)
d)
2
2(n-1)
(n-1)
c)​

Answer 1

Answer:

i think the first one

Explanation:

hope it helps mark me as brainliest

Answer 2

Answer:

i think it is physical science but I don't know answer