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Question
Make a formula for the statement:"The reciprocal of focal length f is equal to the sum of reciprocals of the object distance u and the image distance v."
Solution
Object distance = u
Image distance = v
Reciprocal of object distance = `(1)/"u"`
Reciprocal of Image distance = `(1)/"v"`
sum of reciprocals = `(1)/"u" + (1)/"v"`
Reciprocal of focal length = `(1)/"f"`
As per the data: `(1)/"f" = (1)/"u" + (1)/"v"`.
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