Question

When the surface of the lake is calm, a fish, submerged in water will see the entire outside world within an inverted cone whose apex is situated at the eye of the fish and what angle cone subtends at eye of fish : (µw = 4/3?

Answer 1

2c=angle of cone

Sin c=1/4/3

Sin c=3/4

Angle of cone =2sin^-1(3/4)

=98°

Answer 2

Answer:

The angle of cone is 98°

Step-by-step explanation:

Here the fish submerged in water will see the entire outside world within an inverted cone.

Value of µ is 4/3

Let 2C be angle of Cone

$\sin(c) = \frac{u₁}{u₂}$

$\sin(c) = \frac{1}{ \frac{4}{3} }$

$\sin(c) = \frac{3}{4}$

$c = \frac{1}{ \sin( \frac{3}{4} ) }$

So angle of Cone is

$\frac{2}{ \sin( \frac{3}{4} ) }$

So angle of Cone is 98°