The angle of refraction rounded to the nearest whole number
an incident light ray strikes water at an angle of 20 degrees.
the index of refraction of air is 1.0003, and the index of
refraction of water is 1.33.
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Explanation:

Using Snell's law which is represented by

Making the subject of the formula then

Here and are the angles of incidence and refraction in water and air respectively

and are refraction index

Substituting 1.0003 for and 1.33 for then for we obtain

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