Question

A container is filled with water H = upto height
1m. Find out diameter of disc at top of water surface
from which light is coming out.
u =4/3​

Answer 1

$\underline{\boxed{ \orange{ \bold{ \sf{ \huge{answer}}}}}} \\ \\ \longmapsto \: \sf \: radius \: of \: disc \: in \: this \: type \: of \: question \\ \sf \: is \: given \: as \\ \\ \boxed{ \red{ \bold{ \sf{r = \frac{h}{ \sqrt{ { \mu}^{2} - 1 } } }}}} \\ \\ \longmapsto \: \sf \: here \: h = 1 \: m \: and \: \mu = \frac{4}{3} \\ \\ \longmapsto \sf \: r = \frac{1}{ \sqrt{ { (\frac{4}{3}) }^{2} - 1 } } = \sqrt{ \frac{9}{7} } = 1.13 \: m \\ \\ \longmapsto \: \sf d = 2r = 2.26 \: m$