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Electromagnetic Spectrum

Which of the ...

Question

Which of the following has the same value for all waves when travelling through vacuum?

A

Wavelength

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B

Speed

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C

Frequency

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D

Amplitude

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Solution

The correct option is B
Speed

The speed of light is constant in the vacuum and it is nearly equal to 300000 km/s. This is applicable to electromagnetic waves also . Hence, all the waves of an electromagnetic spectrum move at the speed nearly equal to 300000 km/s. Different parts of the spectrum have different wavelengths, frequency and amplitude.

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