The index of refraction of the water is equal to 2.37.
Snell's law can be described as a formula used to describe the relationship between the angles of incidence and angle of refraction, when the light passes through a boundary between two different medium like water, air, or glass.
Snell's law states that the ratio of the sines of the angle of incidence and angle of refraction is equal to the refractive index of the second medium which is equal to the ratio of the refractive indices of the two media
[tex]{\displaystyle {\frac {\sin \theta _{1}}{\sin \theta _{2}}}=n_{21}={\frac {n_{2}}{n_{1}}}={\frac {v_{1}}{v_{2}}}}[/tex]
Given, the angle of incidence, i = 25°
The index of refraction of air, n₂ = 1.00
By using Snell's law, we can find the index of refraction of the water:
[tex]{\displaystyle {\frac {\sin i}{\sin 90}={\frac {1}{n_{1}}}[/tex]
[tex]{\displaystyle n_1 = {\frac {1}{\sin 25}[/tex]
n₁ = 2.37
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