1.

A myopia person can see things clearly only when they lie between 10 cm and 80 cm from the eye. Which lens would enable him to see the moon clearly ?

Answer»

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SOLUTION :Given, far POINT x = 80 cm.
To SEE the moon clearly, he has to use spectacles with concave LENS of focal length, f = -x = -80 cm
Power, `= -1.25 D P = (80)/(f)`


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