The far point of myopic eye is 80cm in front of eye.whatbis the nature and power of lens required to correct the problem?
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v= -80cm
u= (-infinity)
Focal Length:-
1/v - 1/u= 1/f
1/f= 1/(-80) - 1(-infinity) [1/infinity=0]
1/f = 1/80
Therefore f = -80
Corrective lens is of focal length -80cm
Now,
As focal length is in centimeters ,1m=100cm
Power= 1/f
P= 100/ -80
P= -1.25D
Therefore, corrective lens is a concave lens of power -1.25D
Hope the answer is helpful
u= (-infinity)
Focal Length:-
1/v - 1/u= 1/f
1/f= 1/(-80) - 1(-infinity) [1/infinity=0]
1/f = 1/80
Therefore f = -80
Corrective lens is of focal length -80cm
Now,
As focal length is in centimeters ,1m=100cm
Power= 1/f
P= 100/ -80
P= -1.25D
Therefore, corrective lens is a concave lens of power -1.25D
Hope the answer is helpful
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