Question

14. A real image is formed 40.0 cm from a spherical mirror, the image being twice the size of the object.. (a) Is it a concave or convex mirror? Explain. (b) How far from the mirror is the object? (c) What is the focal length of the mirror? (d) Draw this situation on a ray diagram.

Answer 1

solution 114 given : image distance from a spherical mirvion is 40.0 cm magnification m= 2 (a) image is formed real so there spherical miroog is concave minunion because only concave migrmon is formed real image. (b) we know that magnification m-W; -d; where di is the object distance from migonom here" -ive" sign show is gwal that image here m=-2 40.0 cm so -2:- (-18.0) d. (de=-20.0 cm object distance so from minnon is 20.0cm. [c] As we know that (from mignon formula where f'is the focal length of the mirron f: do di d+d; = (-20.0) (-40.0) -- 13.33 cm - 20.6 - 40.. F:-13.33 cm

[d] Center of curvature X.pl pole de {F is focal point image 2 d.