Question

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Query:-

The shape of a pulse gets distorted as it passes through a dispersive medium. Why?

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Answer 1

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A pulse is a single disturbance that travels in space.

It is a wave that is resulted to a combination of many waves.

This disturbance could be a shape of some sort that is composed of different frequencies (different wavelength).

If a pulse passes from one medium into a dispersive medium,

Each wave that comprises the pulse will proceed to its corresponding path,

The dispersion of the waves will result to the distortion of the pulse.

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Answer 2

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➡ A pulse is a single disturbance that travels in space. It is a wave that resulted to a combination of many waves.

This disturbance could be a sort that is composed of different frequencies(different wavelength).

If a pulse passes from one medium into dispersive medium,If a pulse passes from one medium into a dispersive medium,Each wave that comprises the pulse will proceed to it's corresponding path,

The dispersion of the waves will result to the distortion of the pulse

On the other hand ,As the waves of different wavelengths travell in a dispersive medium with different velocities.

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$\large\bold{\underline{{Extra\:Information:}}}$

➤ Wave:

The most important part of this definition is that a wave is a disturbance or variation which travels through a medium. The medium through which the wave travels may experience some local oscillations as the wave passes, but the particles in the medium do not travel with the wave. The disturbance may take any of a number of shapes, from a finite width pulse to an infinitely long sine wave.

See A picture of wave that how it looks.(attachment).

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