A short-sighted person cannot see clearly beyond 2m calculate power of lens required to correct this.
This question is of class10th
chapter:-Human eye!!
Need solution with explanation!!!
Answers
Answered by
116
here, u = - infinity, v = - 2m (or -200cm)
1/f = 1/v - 1/u
1/f = -1/2 + 1/infinity
therefore, f=-2m
P = 1/f = -1/2 = - 0.5 D
hence power of lens req is - 0.5 D
1/f = 1/v - 1/u
1/f = -1/2 + 1/infinity
therefore, f=-2m
P = 1/f = -1/2 = - 0.5 D
hence power of lens req is - 0.5 D
Answered by
45
f = - 2m
so, P = 1/-2
P=-0.5D
so, P = 1/-2
P=-0.5D
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