189
Question
In an experiment, Rakesh used an equilateral triangular glass prism and projected a narrow beam of white light source from one side of the surface of the prism. He placed a screen on the other side and saw many colours appearing as patches on the screen. But when he placed a second identical prism in an inverted position with respect to the first prism, he found a beam of white light emerging out from the other side of the second prism.
Why did the white light split into its constituent colours after passing through the first prism?
In an experiment, Rakesh used an equilateral triangular glass prism and projected a narrow beam of white light source from one side of the surface of the prism. He placed a screen on the other side and saw many colours appearing as patches on the screen. But when he placed a second identical prism in an inverted position with respect to the first prism, he found a beam of white light emerging out from the other side of the second prism.
Why did the white light split into its constituent colours after passing through the first prism?
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Solution
The correct option is D All of the above
The speed of light is constant in vacuum for all colours, but it depends on the wavelength of light when it passes through a medium. We know refractive index of a medium depends on wavelength of light. When white light passes through a prism, each colour refracted to different extents. This results in seperation of colours, producing a spectrum.
The speed of light is constant in vacuum for all colours, but it depends on the wavelength of light when it passes through a medium. We know refractive index of a medium depends on wavelength of light. When white light passes through a prism, each colour refracted to different extents. This results in seperation of colours, producing a spectrum.
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