MCQOPTIONS
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MCQOPTIONS
| 1. |
A hospital uses an ultrasonic scanner to locate tumours in a tissue. The operating frequency of the scanner is 4.2 MHz. The speed of sound in a tissue is 1.7 km/s. The wavelength of sound in tissue is close to |
| A. | \[4\times {{10}^{-4}}m\] |
| B. | \[8\times {{10}^{-4}}m\] |
| C. | \[4\times {{10}^{-3}}m\] |
| D. | \[8\times {{10}^{-3}}m\] |
| Answer» B. \[8\times {{10}^{-4}}m\] | |