Question

दूर स्थित वस्तु को फोकस करके उत्तल लेंस की फोकस
दूरी ज्ञात कीजिए।
Determine the focal length of a convex
lens by focusing a distant object.​

Answer 1

Explanation:

Place the lens on the holder facing a distant object. ... The position of the screen should be such that the sharp image of the distant object is obtained on it. The difference between the position of the lens and the screen is equal to the focal length of the given convex lens