Im Struggling with this AP Physics question on lenses.....
The figure above represents a glass lens that has one flat surface and one curved surface. After incoming parallel rays pass through the lens, the rays pass through the focal point. The focal length is the distance from the center of the lens to the focal point.
A) the rays undergo refraction and change direction at the right surface of the lens, as shown. Explain why the angle of refraction of ray 1 is greater than that of ray 2.
B) The index of refraction of the glass is n, and the radius of the curvature of the lens's right edge is R. A teacher who wants to test a class's understanding aout lenses asks the students if f = nR makes sense for the focal length of the lens in air. Is the teacher's equation reasonable for determination of the focal length? Qualitatively, explain your reasoning, making sure you address the dependance of the focal length on both R and n.
C) An object is placed a distance f/2 (half the focal length) to th4e left of the lens. On which side of the lens does the image form, and what is its distance from the lens in terms of f? Justify your answer.
D) The lens is now placed in water, whcih has an index of refraction that is greater than air but less than glass. Indicate whether the new focal length us greater than, less than, or equal to the focal length in air.
@Kainui
@triciaal
sorry don't remember that stuff
thanks anyway.
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