Question

From the table which lens has less focal length lens (A) power 1D,lens (B) power 2D,lens (C)power 3D,Lens(D)power 4D

Answer 1

Answer:

we know P=1/f (in cm) and P= 100/f (in m)

Explanation:

(A) P=1 so P=1/f ,1=1/f , f=1

(B) P=2 so 2=1/f , f=1/2 = 0.5

(C) P=3 so 3=1/f, f = 1/3 = 0.333

(D) P=4 so 4=1/f, f = 1/4 = 0.25

i guess the lens which has less focal length is the one with power 3D

hope it helps!!

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Answer 2

Sure I will answer it for you mate,

Given values are 1D, 2D, 3D, 4D

Formula is 1/f

so, 1/4 is less than all values

Option D is the best answer

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