Physics

Problem

Ultrasound emitted by a dolphin travels through seawater at

1500\,\text{m/s}

and has a wavelength of

3.0\,\text{cm}

. What is the time period of this ultrasound, expressed in microseconds (

\mu\text{s}

)? a)

2.0\,\mu\text{s}

20\,\mu\text{s}

200\,\mu\text{s}

50\,\mu\text{s}

Intuitive explanation

The key is connecting wave properties through the relationship between speed, wavelength, and frequency. First find the frequency using $v = f\lambda$ , then convert frequency to period with $T = 1/f$ . This two-step approach transforms spatial information (wavelength) into temporal information (period) using the wave equation as your bridge.

Intuitive explanation

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