(i) What is the power of the lens whose focal length is 0.25m ?

(ii) The radii of curvature of the faces of a double convex lens are 20 cm and 25 cm. Its focal length is

      20 cm. Calculate the refraction index of the material.                                 (2 marks)

To view Explanation, Please buy any of the course from below.
Complete Question Bank + Test Series
Complete Question Bank

Difficulty Level: