Find the critical angle for liquid when surrounded by air
A beam of light is incident from air on the surface of a liquid. If the angle of incidence is 25.0° and the angle of refraction is 14.0°, find the critical angle for the liquid when surrounded by air.
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If np is greater than or equal to 5 and nq is greater than or equal to 5, estimate the indicated probability by using the normal distribution as an approximation to the binomial.
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