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प्रश्न
Which physical quantity is the same for UV rays, red light and radio waves when they are travelling in vacuum?
लघु उत्तर
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उत्तर
The physical quantity that is identical for all electromagnetic waves in a vacuum is speed (the speed of light, approximately 3 × 108 m/s.
While their wavelengths and frequencies differ significantly, they all travel at this same constant velocity because they are all composed of oscillating electric and magnetic fields.
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