Questions

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

Remember concepts with our Masterclasses.

80k Users

60 mins Expert Faculty Ask Questions

30 cm away from the mirror

36 cm away from the mirror

30 cm towards the mirror

36 cm towards the mirror

Ready to Test Your Skills?

Check Your Performance Today with our Free Mock Tests used by Toppers!

detailed solution

Correct option is B

Using mirror formula,1f=1v1+1u;-115=1v1-140⇒1v1=1-15+140v1=-24 cmWhen object is displaced by 20 cm towards mirror. Now,u2=-20 cm1f=1v2+1u2;1-15=1v2-120⇒1v2=120-115v2=-60 cmSo, the image will be shift away from mirror by (60-24)cm=36 cm

Talk to our academic expert!

Create Your Own Test
Your Topic, Your Difficulty, Your Pace

Similar Questions

A convex lens is at a distance of 10 cm from a convex mirror of focal length 10 cm as shown in figure. A beam of light parallel to the principal axis is incident on the tens. After refraction through the lens, reflection at the mirror and again refraction through the lens, the final emergent beam refraces the path of the incident beam then focal length of the lens is