In a communication system operating at wavelength 800 nm, only one percent of source frequency is available as signal bandwidth. The number of…

In a communication system operating at wavelength $\displaystyle 800$ nm , only one percent of source frequency is available as signal bandwidth. The number of channels accomodated for transmitting TV signals of band width $\displaystyle 6$ MHz are (Take velocity of light $\displaystyle \mathrm{c}=3 \times 10^8 \mathrm{~m} / \mathrm{s}, \mathrm{h}=6.6 \times 10^{-34} \mathrm{~J}-\mathrm{s}$ )