Answer:
angle of refraction = 39.6°
Apparent depth = 0.253 m
Step-by-step explanation:
distance of fish appeared by the man inside water, Real depth , do = 0.33 m
Angle, θa = 56°
refractive index of air , na = 1
refractive index of water, nw = 1.3
Let the angle of refraction is r and the apparent depth of the fish is d.
According to the Snell's law

1 x Sin 56° = 1.3 x Sin r
Sin r = 0.6377
r = 39.6°
According to the formula of normal shift

Apparent depth = 0.33/1.3
d = 0.253 m