Power of given lens is +25 D. Find the distance FO.
A person wears spectacles of power -1D.Find defect of eye and f.
Power of lens is 2.5 dioptre, find focal length,type of lens.
Dikshu uses spectacle to remove his defect of eye having power -0.5 D. What type of lens has he used , focal length of the lens, defect of vision.
Prapti uses a convex lens of focal length 20 cm in her spectacles. Find the power of lens.
A man uses spectacles, power 5D then calculate focal length. what is the vision defect?
What types of defect is found in the given diagram of eye ? Draw a eye with correction. If focal length of the lens of the spectacles is 50 cm, what will be the power of spectacles.
The focal length of convex lens is 2 cm and candle having height 1 cm is kept at distance of 4 cm from lens.What distance does the image of candle fall. Give the ray diagram .Calculate the magnification of the image.
A hand lens has 25D. Where should the lens be kept to read the letters of book?
Calculate the power of convex lens with focal length 80 cm.
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