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All waves on the electromagnetic spectrum travel at the same speed in a vacuum. The speed of these waves in a vacuum is 3x108 m/s. As the wavelength of a wave doubles, how does …

All waves on the electromagnetic spectrum travel at the same speed in a vacuum. The speed of these waves in a vacuum is 3x108 m/s. As the wavelength of a wave doubles, how does …
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All waves on the electromagnetic spectrum travel at the same speed in a vacuum. The speed of these waves in a vacuum is 3x108 m/s. As the wavelength of a wave doubles, how does the speed and frequency of the wave change?

User GlassZee
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==> As you started by saying, all EM waves travel at the same speed in vacuum.

==> As the wavelength doubles, the frequency drops by half. Their product is always the speed, which doesn't change.
User Ygautomo
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The speed remains the same but the frequency decreases as wavelength increases and vice versa as v=f X wavelength 
User Thomas Verbeek
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