Which statement is correct about the speed of electromagnetic waves in a vacuum?
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Explanation:
Speed of electromagnetic wave in vacuum is 1μ0ε0=c, where c is the speed of light. As we go from gamma rays to radio waves frequency decreases and wavelength increases thereby maintaining the product constant. Therefore, option c) is the correct option.
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Electromagnetic waves travel at the speed of light (300,000,000 meters per second) in a vacuum.
Explanation:
- An electric and magnetic field do not require any medium to exert their effect.
- Hence in the presence of electric and magnetic field vectors that vibrate perpendicular to each other and receive disturbances EM waves travel in vacuum.
- Electromagnetic waves are just an observed phenomenon.
- The speed of electromagnetic waves will be different in glass than in water in air.
- The speed of a wave is often calculated as the product of frequency and wavelength.
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