A certain medical imaging device commonly referred to as "ultrasound" creates sound by
oscillating with a period of $0.4 \mu _ { s }$ .What is the frequency of this oscillation?

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The Answer of A certain medical imaging device commonly referred to as "ultrasound" creates sound by
oscillating with a period of $0.4 \mu _ { s }$ .What is the frequency of this oscillation?

A Certain Medical Imaging Device Commonly Referred to as "Ultrasound 0.4μs0.4 \mu _ { s }0.4μs​

A Certain Medical Imaging Device Commonly Referred to as "Ultrasound $0.4 \mu _ { s }$