Question

The MRI (Magnetic Resonance Imaging) body scanners used in hospitals operate with $400M{H}_Z$ radio frequency. The wavelength corresponding to this radio frequency is:

• A. 0.75 m
• B. 0.75 cm
• C. 1.5 m
• D. 2 cm

Answer 1

The correct option is A 0.75 m

From equation, $c=\lambda \times v$

$\lambda =\frac{c}{v}=\frac{3\times {10}^{8}m{s}^{-1}}{400\times {10}^6{s}^{-1}}=0.75m$