Question

REMARKS The negative sign on q indicates that the image is in the same medium as the object (the side of incident light), in agreement with our ray diagram, and therefore must be virtual. The positive value for M means that the image is upright. QUESTION How would the image height be affected if the ball and observer were immersed in water? It would be smaller. It would be larger. There would be no change. PRACTICE IT Use the worked example above to help you solve this problem. A coin 1.72 cm in diameter is imbedded in a solid glass ball of radius r = 32.8 cm (see figure). The index of refraction of the ball is 1.50, and the coin is d = 21.9 cm from the surface. (a) Find the position of the image of the coin. cm (b) Find the height of the coin's image. cm

          REMARKS The negative sign on q indicates that the image is in the same medium as the object (the side of incident light), in agreement with our ray diagram, and therefore must be virtual. The positive value for M means that the image is upright.

QUESTION How would the image height be affected if the ball and observer were immersed in water?
It would be smaller.
It would be larger.
There would be no change.

PRACTICE IT
Use the worked example above to help you solve this problem. A coin 1.72 cm in diameter is imbedded in a solid glass ball of radius r = 32.8 cm (see figure). The index of refraction of the ball is 1.50, and the coin is d = 21.9 cm from the surface.
(a) Find the position of the image of the coin.
cm
(b) Find the height of the coin's image.
cm

$REMARKS The negative sign on q indicates that the image is in the same medium as the object (the side of incident light), in agreement with our ray diagram, and therefore must be virtual. The positive value for M means that the image is upright. QUESTION How would the image height be affected if the ball and observer were immersed in water? It would be smaller. It would be larger. There would be no change. PRACTICE IT Use the worked example above to help you solve this problem. A coin 1.72 cm in diameter is imbedded in a solid glass ball of radius r = 32.8 cm (see figure). The index of refraction of the ball is 1.50, and the coin is d = 21.9 cm from the surface. (a) Find the position of the image of the coin. cm (b) Find the height of the coin's image. cm$

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