A narrow beam of white light slab having parallel faces.

A narrow beam of white light enters slab having parallel faces.

A narrow beam of white light goes through a slab having parallel faces.

A narrow beam of white light goes through a slab having parallel faces.

A narrow beam PQ of white light is passing through a glass prism ABC as shown in the diagram. Study the diagram and answer any four questions. What is dispersion of light?

(a) A narrow beam of white light is incident on three glass objects as shown below. Comment on the nature of the behaviour of the emergent beam in all three cases. (b) There is a similarity between two of the emergent beams. Identify the two.

A narrow beam of white light is shown to pass through a triangular glass prism. After passing through the prism, it produces a specturm XY on a screen. (a) State the colour seen at X and Y . (b) Why do different colours of white light bend through different angles with respect to the incident beam of light ? .

A narrow beam of white light passes through a triangular glass prism and gets split up into seven colours marked 1 to 7. Which two positions correspond closely to the colour of: 'danger' or 'stop signal lights'?

What is the cause of dispersion of white light through a glass prism Draw a ray diagram to show the path of light when two identical glass prisms are arranged together in inverted position with respect to each other and narrow beam of white light is allowed to fall obliquely on one of the faces of the prisms.

What is the cause of dispersion of white light through a glass prism Draw a ray diagram to show the path of light when two identical glass prisms are arranged together in inverted position with respect to each other and narrow beam of white light is allowed to fall obliquely on one of the faces of the prisms.