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Question 30 (1 point) A tank of unknown transparent fluid is observed by the person at...
When the rectangular metal tank in the figure is filled to the top with an unknown liquid, observer O, with eyes level with the top of the tank, can just see corner E. A ray that refracts toward O at the top surface of the liquid is shown. If D = 102.3 cm and L 1.86 m, what is the index of refraction of the liquid? Normal to liquid surface |E L
QUESTION If the water is replaced by a transparent fluid with a higher index of refraction, the critical angle of the fluid- air boundary is: O smaller. o the same as for water. o larger PRACTICE IT Use the worked example above to help you solve this problem. (a) Find the critical angle for a water-air boundary if the index of refraction of water is 1.33. (b) Use the result of part (a) to predict what a fish will see...