Question

frequency ( =400 mathrm{M} mathrm{Hz}=0 )
( begin{aligned} lambda text { = Wave deng th } &=frac{C}{1} &=frac{3 times 10^{8}}{400 times 10^{6}} & Rightarrow frac{3}{4} mathrm{m} &=75 mathrm{cm} text { or } underline{0.75 mathrm{m}} end{aligned} )

# (B) : Quantum theory of light & Photoelectric Effect he MRI (magentic resonance imaging) body scanners used in hospitals operate with 400 MHz radio, equency. The wavelength corresponding to this radio frequency is: .) 0.75 m (B) 0.75 cm (C) 1.5 m (D) 2 cm which licht hamnyimum anaru

Solution