1.

(a) Two lenses have power of (i) + 2 D (ii) −4 D. What is the nature and focal length of each lens?​(b) An object is kept at a distance of 100 cm from each of the above lenses. Calculate the (i) image distance (ii) magnification in each of the two cases.

Answer» (a) Two lenses have power of (i) + 2 D (ii) −4 D. What is the nature and focal length of each lens?

​(b) An object is kept at a distance of 100 cm from each of the above lenses. Calculate the (i) image distance (ii) magnification in each of the two cases.


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