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Draw a ray diagram showing the dispersio...

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

Text Solution

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The ray diagram showing the dispersion through a prism when a narrow beam of white light is incident on one of its refracting surfaces are shown below

The order of the colour is Violet, indigo, Blue, Green, Yellow, Orange and Red starting from the base of the prism to upwards.
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How will you use two identical prisms so that a narrow beam of white light incident on one prism emerges out of the second prism as white light?

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Knowledge Check

  • When a ray of light is incident normally on one refracting surface of an equilateral prism (Refractive index of the material of the prism =1.5

    A
    Emerging ray is deviated by `30`
    B
    Emerging ray is deviated by `45^(@)`
    C
    Emerging ray just grazes the second refracting surface
    D
    The ray undergoes total internal reflection at the second refracting surface

  • When a ray of light is incident normally on one refracting surface of an equilateral prism of refractive index 1.5, then

    A
    the ray undergoes total internal reflection at the second refracting surface of prism
    B
    emergent ray is deviated by `30^(@)`
    C
    emergent ray is deviated by `60^(@)`
    D
    emergent ray just grazes the second refracting surface of the prism

  • A ray of light containing both red and blue colours is incident on the refracting surface of a prism. Then.

    A
    both colours suffer equal deviation
    B
    red colour suffers more deviation
    C
    red colour suffers less.deviation
    D
    deviation depends on the angle of prism

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    How will you use two indentical prisms so that a narrow beam of white light incident on one prism emerges out of the second prism as white light ? Draw the diagram.

    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.

    State the cause of dispersion of white light by a 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 a combination of two identical prisins arranged together in inverted position with respect to each other, when it is allowed to fall obliquely on one of the faces of the first prism of the combination.

    How will use two identical glass prisms so that a narrow beam of white light incident on one prism emerges out of the second prism as white light ? Draw and label the ray diagram.

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