1. A solid glass sphere with a radius of 5.00 cm and index of refraction of 1.52

Question

1. A solid glass sphere with a radius of 5.00 cm and index of refraction of 1.52 has a small coin embedded 3.00 cm from the front surface of the sphere. For the viewer looking at the coin through the glass, at what distance from the front surface of the glass does the coin’s image appear to be located?

a. 2.48 cm
b. 3.20 cm
c. 5.00 cm
d. 6.85 cm

2. Two convex thin lenses with focal lengths 10.0 cm and 20.0 cm are aligned on a common axis, running left to right, the 10-cm lens being on the left. A distance of 20.0 cm separates the lenses. An object is located at a distance of 15.0 cm to the left of the 10-cm lens. Where will the final image appear as measured from the 20-cm lens?

a. -13.3 cm
b. -6.67 cm
c. +6.67 cm
d. +13.3 cm


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Explanation / Answer

1. c. 5.00 cm 2. d. +13.3 cm

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