the near point of an elderly person is 50cm from the eye. find the focal length and power of lens.(ans.50cm,+2 D)
Answers
Answered by
8
p = 100/f
f= 50cm
therefore p = 100/50
= 2D
f= 50cm
therefore p = 100/50
= 2D
Answered by
19
The disease is hypermetropia and the lens that is use is convex
1/f = 1/-x +1/25
1/f = 1/-50+ 1/25
1/f = -1+2/50
1/f = 1/50
f = 50 cm
P = 1/f
P = 1/50/100
P= 100/50=2
P = 2 D
1/f = 1/-x +1/25
1/f = 1/-50+ 1/25
1/f = -1+2/50
1/f = 1/50
f = 50 cm
P = 1/f
P = 1/50/100
P= 100/50=2
P = 2 D
miinion:
will u tell me why u hv taken v=50 in negative
oh thank u
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