What would you expect to happen to the magnitude of the power of a lens when it is placed in water (n = 1.33).You may safely assume that the index of refraction for the lens is greater than 1.33.
A)It would increase.
B)It would decrease.
C)It would stay the same.
D)It would depend if the lens was converging or diverging.

Question

Quizplus · Accepted Answer

When a lens is placed in water, its power or focal length decreases due to the decrease in the effective index of refraction between the lens and water. This is because the light traveling from water to the lens bends away from the normal, making it seem like the lens is less curved than when viewed through air. Since the index of refraction for the lens is greater than 1.33, it will experience a greater decrease in power compared to a lens with a lower index of refraction. Therefore, the correct choice is B, which indicates that the power of the lens would decrease when it is placed in water.

What Would You Expect to Happen to the Magnitude of the Power