Shaalaa.com | Light Reflection and Refraction part 9 (Sign convention of Sherical Mirror)
The focal length of a spherical mirror of radius of curvature 30 cm is:
(a) 10 cm
(b) 15 cm
(c) 20 cm
(d) 30 cm
List the sign conventions for reflection of light by spherical mirrors. Draw a diagram and apply these conventions in the determination of focal length of a spherical mirror which forms a three times magnified real image of an object placed 16 cm in front of it.
List the new Cartesian sign convention for reflection of light by spherical mirror. Draw a diagram and apply these conventions for calculating the focal length and nature of spherical mirror which forms a 1/3 times magnified virtual image of an object placed 18 cm in front of it.