Draw the diagram of dispersion of light through prism and show the position of different colours of light obtained on screen.

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Solution

Dispersion is the separation of light into its constituent colors.

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Question 20
Draw a ray diagram showing the dispersion through a prism when a narrow beam of white light is incident on one of its refracting surfaces. Also indicate the order of the colours of the spectrum obtained.

Q. State the cause of dispersion of white light by glass prism. How did Newton, using two identical glass prisms show that white light is made of seven colours? Draw a ray diagram to show the path of a narrow beam of white light, through combination of two identical prisms (where one of the prism is in an inverted position with respect to the other), when it is allowed to fall obliquely on one of the face of the first prism of the combination.

Q. What is dispersion of white light? What is the cause of such dispersion? Draw a diagram to show the dispersion of white light by a glass prism.

Q. Draw a diagram to show how white light can be dispersed into a spectrum by using a glass prism. Mark the various colours of the spectrum.

Statement 1: When white light ray passes through a prism, it disperses into seven different colours, and this phenomenon is called dispersion.

Statement 2: In a refracting media, lights of different colour travel at different speed.

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