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.
An object is kept 45cm away, convex lens of power 10D. locate the image formed by the lens with a ray diagram.
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.
An object is placed in front of convex lens, f = 4 cm then draw a ray diagram of image, calculate magnification, power of lens ?
A man uses spectacles, power 5D then calculate focal length. what is the vision defect?
If the power of lens is -2.5 D, what is the focal length of the lens ?
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.
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