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The critical angle for water is 49°. If a ray of light
strikes the upper surface of a pond at an angle
of incidence of 45°, will it be totally internally
reflected? Explain your answer.

Respuesta :

Answer:

Snell's Law states

Ni sin i = Nr sin r

Judging from the question the source of the ray is in the water (directed up)

or NI = 1 / sin 49      Ni = 1.325 deg     the critical angle

From inside the pond:

Nr = 1.325 * sin 45 / 1 = 94 deg  

So refraction can occur  outside the pond and you do not have total internal refection.

 

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