A person needs a lens of power for correcting his distant vision. For correcting his near vision he needs a lens of power. What is the focal length of the lens required for correcting (i) distant vision, and (ii) near vision?
Step 1. Given data,
Power for correcting distant vision, =
Power correcting near vision =
Step 2. Formula used,
is the power of lens that is how well a lens can converge or diverge light
is the focal length of the lens used
Step. 3 Calculating the focal length for distant vision,
Step 4. Calculating focal length for near vision,
We can see that power and focal length are inversely proportional that is if the power is more then the focal length will be lesser
Hence Focal length for distant vision= 0.185m and Focal length for near vision= 0.66m