Answer:
4.57 degree
Explanation:
As the dolphin is under water, so the angle is angle of refraction which is equal to 48.4 degree.
refractive index of water, n = 1.333
Let the angle of incidence which is the angle between the incident ray and the normal is i.
By use of Snell's law
[tex]n = \frac{Sin i}{Sin r}[/tex]
[tex]1.333 = \frac{Sin i}{Sin 48.4}[/tex]
[tex]Sin i = 1.333\times Sin 48.4 = 0.9968[/tex]
i = 85.43 degree
Angle made with the horizon = 90 - 85.43 = 4.57 degree
