Answer:
A) 37°
Step-by-step explanation:
The formula for the critical angle is:
Where,
is the critical angle
is the refractive index of the refractive medium. = 1.33
is the refractive index of the incident medium. = 1.43
Applying in the formula as:
The critical angle is = sin⁻¹ 0.93006 = 68.4442°
Angle of incidence is half of the critical angle. So,
Angle of incidence = 68.4442° / 2 = 34.2221°
Using Snell's law as:
Where,
is the angle of incidence ( 34.2221° )
is the angle of refraction ( ? )
is the refractive index of the refraction medium (water, n=1.33)
is the refractive index of the incidence medium (glass, n=1.43)
Hence,
Angle of refraction= sin⁻¹ 0.6047 = 37°.