in a light experiment with a convex lens a student plotted a graph as shown above of the reciprocal of object distance (1)/u against the reciprocal of image distance (1)/v . the focal length of the lens is given as
-
A.
slope of line PQ -
B.
Reciprocal of either OP or OQ -
C.
Length OP or OQ -
D.
area under the graph E ratio OP/OQ
Correct Answer: Option B
Explanation
The intercept on either of the axes of the graph of (frac{1}{u}) against (frac{1}{v}) gives the value of (frac{1}{f}). Hence, the reciprocal of this intercecpt gives the value of the focal length.