Physics

Problem

There is a small black dot at the centre

C

of a solid glass sphere of refractive index

\mu

. When seen from outside, the dot will appear to be located: a. away from

C

for all values of

\mu

b. at

C

for all values of

\mu

c. at

C

for

\mu = 1.5

, but away from

C

for

\mu \neq 1.5

d. at

C

only for

\sqrt{2} \leq \mu \leq 1.5