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You are told that a wave has a wavelength of 450 x 10^-9 m and a frequency of 6.67 x 1014 Hz. Is it a sound wave? How do you know?
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You are told that a wave has a wavelength of 450 x 10^-9 m and a frequency of 6.67 x 1014 Hz. Is it a sound wave?

How do you know?

User Alex Glukhovtsev
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4.8k points

1 Answer

5 votes

Step-by-step explanation:

The speed of a wave is the frequency times wavelength.

v = fλ

v = (6.67×10¹⁴ Hz) (450×10⁻⁹ m)

v = 3.0×10⁸ m/s

This wave moves at the speed of light, so it cannot be a sound wave.

User Samvermette
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5.1k points
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