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Question : The far point of a myopic person is 150cm in front of eye, calculate the focal length and the power of lens to enable see distant object clearly.

Answer»

SOLUTION :Far point V = 150 CM
USING lens FORMULA `= 1/f = 1/v = 1/u` `/f = (-1/150) - (-1/oo) `
` 1/f = -1/500`
`f = -150 , " power " = 100/150 = 2/3 =- 0.66D`


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