Phyx 135‐3‐01, Quiz 2Name _______________________________________1) A two‐meter‐long vertical pole extends from the bottom of a swimming pool to a point 50 cm above thewater. Sunlight is incident at an angle of= 55 degrees. What is the length of the shadow of the pole onthe level bottom of the pool? (n = 4/3 for water.)Solution:The 55 degrees given in the problem is not theangle1that we need for Snell’s Law, because1must bemeasured from the normal to the surface. Hence1= 90 – 55 = 35 degrees. Then consider a ray that grazesthe top of the pole, as shown in the diagram below.
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