Question

an object is placed at a distance of 30 cm in front of a convex mirror of focal length 15 cm. write 4 characteristics of of image formed by the mirror?

Answer 1

formula related to focal length f, object-to-mirror distance u and image-to-mirror distance v is given by

1/v + 1/u = 1/f

1/30 + 1/v = 1/15

solving the above eqn for v, we get v = 30 cm

 

(1) image is formed at a distance 30 cm from concave mirror

(2) Since image distance and object distance are same ( both are at 2F), magnification = 1

     Image and object are same size.

(3) image is real

(4) image is inverted