In vacuum what will be common among X-rays, visible light, radio waves and infra-red rays ?

Speed

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Frequency

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Wavelength

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Amplitude

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Solution

The correct option is A Speed
All have different frequency, different wavelength, different amplitudes but as such all are electromagnetic waves so all travel with same speed $(c = 3 \times 10^{8} m / s)$ .

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In vacuum what will be common among X-rays, visible light, radio waves and infra-red rays ?

The correct option is A SpeedAll have different frequency, different wavelength, different amplitudes but as such all are electromagnetic waves so all travel with same speed (c=3×108m/s).

The correct option is A Speed
All have different frequency, different wavelength, different amplitudes but as such all are electromagnetic waves so all travel with same speed $(c = 3 \times 10^{8} m / s)$ .