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प्रश्न
What would be the diameter of the image of the flower on the film?
योग
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उत्तर
d1 = 5 cm = 50 mm
m = `"v"/"u" = "d"_2/"d"_1`
`66.6/-200 = "d"_2/50`
d2 = 16.65 mm = 1.66 cm
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