An object is placed in front of a converging lens of a focal length 20cm. The image is virtual and has a magnification of 2. What is the distance of the object from the lens?

Similar Questions

Let a thin capillary tube be replaced with another tube of insufficient length then, we find water ...

In a resonance tube experiment, the effective length of the air column for the first resonance is 20...

Which of the following statements correctly defines quantitatively the work done by a force? the pro...

Thermal energy added or removed from a substance that changes the state of the substance is called ...

Which of the following phenomena supports the theory that waves have a particle nature? ...

Which of the following is not a conductor of electricity? ...

An object is moving with a velocity of 5m-1. At what height must a similar body be situated to have ...

In an electrolysis experiment, a cathode of mass 5g is found to weigh 5.01g after a current of 5A fl...

The region around a magnet in which magnetic force can be expressed is known as ...

When the speed of a car is halved, its kinetic energy is ...