A 2cm diameter coin rests flat on the bottom of a bowl in which the water is 20cm deep (μw=4/3). If the coin is viewed directly from above, what is its apparent diameter?
A
2cm
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B
1.5cm
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C
2.67cm
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D
1.67cm
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Solution
The correct option is A2cm For a plane refracting surface, the lateral magnification is 1. Thus, the image of the coin will be of the same size as the coin itself.