1.

An object is placed at a distance of 40 cm from aconcave mirror of focal length 15 cm. If the objedctis displaced through a distance of 20 cm towardsthe mirror, the displacement of the image will be

Answer»

In the initial setup, the object distance is 40 cm, which gives 24 cm image distance given the focal length of 15 cm. (equation: 1/15= 1/40 + 1/i)

The second equation changes object distance to 20 cm (40–20), which results in 60 cm as the image distance. (equation: 1/15= 1/20 + 1/i)

The difference between 60 and 24 is 36 cm (in the direction away from mirror).



Discussion

No Comment Found

Related InterviewSolutions