What is the wavelength at 5 MHz given speed 1540 m/s?

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Multiple Choice

What is the wavelength at 5 MHz given speed 1540 m/s?

Explanation:
Wavelength comes from dividing how fast the wave travels by how often it repeats. Use λ = v / f. Here, v = 1540 m/s and f = 5 MHz = 5,000,000 Hz. So λ = 1540 / 5,000,000 = 0.000308 m, which is 0.308 mm. The other options would imply different frequencies: 0.154 mm would need about 10 MHz, 0.615 mm about 2.5 MHz, and 1.54 mm about 1 MHz, not 5 MHz.

Wavelength comes from dividing how fast the wave travels by how often it repeats. Use λ = v / f. Here, v = 1540 m/s and f = 5 MHz = 5,000,000 Hz. So λ = 1540 / 5,000,000 = 0.000308 m, which is 0.308 mm.

The other options would imply different frequencies: 0.154 mm would need about 10 MHz, 0.615 mm about 2.5 MHz, and 1.54 mm about 1 MHz, not 5 MHz.

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