Question 10 of 14 - 17 . . . View Policies Current Attempt in Progress In the figure, a 1.9-m-long vertical pole extends from the bottom of a swimming pool to a point 50.0 cm above the water. Sunlight is incident at angle 0 = 45.0. What is the length in meters of the shadow of the pole on the level bottom of the pool? The water has an index of refraction of 1.33. Blocked sunrays Number Units VCurrent Attempt in Progress In the gure, light initially in material 1 refracts into material 2, crosses that material, and is then incident at the critical angle on the interface between materials 2 and 3. The indices of refraction are n1 = 1.58, In = 1.34, mg = 1.18. (a) What is angle 9? (b) If 9 is increased, is there refraction of light into material 3? (a) Number n Units v (b) V View Policies Current Attempt in Progress Flying Circus of Physics A catfish is 1.7 m below the surface of a smooth lake. (a) What is the diameter of the circle on the surface through which the fish can see the world outside the water? (b) If the fish descends, does the diameter of the circle increase, decrease, or remain the same? Assume that the index of refraction of water is 1.333. (a) Number i Units (b)