Lakhmir Singh Physics Class 10 Solutions Page No:210
Question 11: An object is placed 15 cm from (a) a converging mirror, and (b) a diverging mirror, of radius of curvature 20 cm. Calculate the image position and magnification in each case.
Solution :
fig. formation of image by the 'concave mirror when the object Is palced between its pole and focus.
(b) f = -20cm. u = -10cm. v= ?
We know that
(c) Characteristics of image formed
(i) Image is virtual.
(ii) Image is erect.
Question 12: An object 20 cm from a spherical mirror gives rise to a virtual image 15 cm behind the mirror. Determine the magnification of the image and the type of mirror used.
Solution : u = -20cm v = 15cm (virtual image)
We know that
The mirror used is of convex type.