\ssankurathri said:hi rautio
does this high frequency has anything to do with length of the antenna?
i think if frequency is high,it will have high energy to travel long distances.is it true?
cheers
skr
Rautio -- Let me understand your above statement. Generally higher the frequency, lesser the wavelength. That is why AM being lower in frequency can travel longer distance whereas FM (high frequency) decays at a faster pace and can cover only a shorter distance. If we transmit AM & FM with the same power, will they reach the same distance?? What is your stand in this statement?ssankurathri -- The energy of the photon has nothing to do with how far it will travel through empty space. If the energy (i.e., frequency) matches a resonant mode of a molocule, it will get absorbed while other photos with different energies (both above and below) pass with no trouble. One such molucule is O2, with a resonant frequency of around 60 GHz (as I recall). If you isotropically (for example) transmit one watt at 1 MHz, or at 1000 GHz, it will travel the same distance, at the same speed, with the same flux (watts per meter squared) at all distances, provided it is traveling through empty space.
arunkumar said:Rautio -- Let me understand your above statement. Generally higher the frequency, lesser the wavelength. That is why AM being lower in frequency can travel longer distance whereas FM (high frequency) decays at a faster pace and can cover only a shorter distance. If we transmit AM & FM with the same power, will they reach the same distance?? What is your stand in this statement?ssankurathri -- The energy of the photon has nothing to do with how far it will travel through empty space. If the energy (i.e., frequency) matches a resonant mode of a molocule, it will get absorbed while other photos with different energies (both above and below) pass with no trouble. One such molucule is O2, with a resonant frequency of around 60 GHz (as I recall). If you isotropically (for example) transmit one watt at 1 MHz, or at 1000 GHz, it will travel the same distance, at the same speed, with the same flux (watts per meter squared) at all distances, provided it is traveling through empty space.
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