## Question

###### Consider the physical system shown in Figure $26-57$. For this problem we assume that the angle of incidence at the air-oil interface can be varied from $0^{\circ}$ to $90^{\circ}$. (a) What is the maximum possible value for $\theta$, the angle of refraction in the water? (b) If an oil with a larger index of refraction is used, does your answer to part (a) increase or decrease? Explain.

Consider the physical system shown in Figure $26-57$. For this problem we assume that the angle of incidence at the air-oil interface can be varied from $0^{\circ}$ to $90^{\circ}$. (a) What is the maximum possible value for $\theta$, the angle of refraction in the water? (b) If an oil with a larger index of refraction is used, does your answer to part (a) increase or decrease? Explain.

## Answers

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