Assume that lasers are available whose wavelengths can be precisely tuned to anywhere in the visible range that is, in the range 450 nm 650 nm If every television channel occupies a bandwidth of 10 MHz, how many channels can be accommodated within this wavelength range ...

Let the range of frequency of the microwave be f Then t ...

Assume that lasers are available whose wavelengths can be precisely tuned to anywhere in the visible range-that

Question:

Assume that lasers are available whose wavelengths can be precisely "tuned" to anywhere in the visible range-that is, in the range 450 nm < λ < 650 nm. If every television channel occupies a bandwidth of 10 MHz, how many channels can be accommodated within this wavelength range?