If a person wants to see an enlarged image of the object by using a convex lens then the lens must be held
Important Questions on Light
Which of the following ray diagrams shown below shows respectively the shortsightedness condition and its correctness by using a lens?
The diagram shows a ray of light reflected at a plane mirror. Which pair of the angle of incidence and angle of reflection is correct?
| Angle of incidence | Angle of reflection | |
An optician holds a test card behind a patient. The patient then looks in the plane mirror which is away. How far away from the patient's eyes is the image of the test card?
The diagram shows a ray travelling through a glass slab. Which option in the table gives the correct name for all three rays?
| Incident ray | Emergent ray | Refracted ray | |
| Incident ray | Refracted ray | Emergent ray | |
| Emergent ray | Incident ray | Refracted ray | |
| Emergent ray | Refracted ray | Incident ray |
A narrow beam of white light is passed through a glass prism as shown in the figure.
Which of the following is the correct order of colours emerging from the prism?
| Red | Blue | Green | |
| Red | Green | Blue | |
| Blue | Green | Red | |
| Blue | Red | Green |
A parallel beam of light is incident on a converging lens parallel to its principal axis. As one moves the source of light away from the lens on its principal axis, the intensity of light
