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Sahay Sir > Question Answers > NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions > Physics > Chapter 32 - Ray Optics > A boy is trying to start a fire by focusing Sunlight on a piece of paper using an equi-convex lens of focal length 10 cm. The diameter of the Sun is 1.39×10^9m and its mean distance from the earth is 1.5×10^11m. What is the diameter of the Sun’s image on the paper ?

A boy is trying to start a fire by focusing Sunlight on a piece of paper using an equi-convex lens of focal length 10 cm. The diameter of the Sun is 1.39×10^9m and its mean distance from the earth is 1.5×10^11m. What is the diameter of the Sun’s image on the paper ?

A biconvex lens has a radius of curvature of magnitude 20 cm. Which one of the following options best describe the image formed of an object of height 2 cm placed 30 cm from the lens?