A prism splits up light into different colours but a glass slab does not show dispersion because
Important Questions on Light
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
Three light bulbs are concealed from an observer by an opaque wall as shown. Without shifting the positions of the observer and the bulbs, the images of which of the bulbs can the observer see from the plane mirror?
Match the column I with column II and column III and select correct option from the codes given below. (Note: These columns are for convex lens.)
| Column (Position of the object) | Column (Position of the image) | Column (Type of image) |
|||
| Object beyond | At | Real, inverted, large |
|||
| Object at | Same side as the object | Virtual, erect, magnified | |||
| Object between and | Beyond | Real, inverted, same size | |||
| Object within the focal length | Between and | Real, inverted, diminished | |||
