Question

An object is placed at
© 10 cm © 15 cm
Find its pole of a concave mirror of focal length 10 cm .write image characteristics

Answer 1

Size of object= 2cm.Object distance = -15 cm = uFocal length= -10 cm= fApplying mirror equation,1/v +1/u = 1/fWe can find out the image distance v.That comes -30 cm using sign convention.Using the formula of magnification for mirrors,m=-v/uWe get that the magnification is -2.As magnification is greater than 1, the image is magnified and as it is negative it is real and inverted.Also by using the formula, m = height of image divided by height of object we get the size of image as 4 cm.