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प्रश्न
The magnification for a mirror is -3. How are u and v related?
उत्तर
Magnification of a mirror is
m = `-"v"/"u"`
∵ m = -3
∴ - 3 = `-"v"/"u"`
∴ v = 3u
But , u will always be negative
∴ v = -3u
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