Radio waves and light are both electromagnetic waves and they both consist
of photons. The photons of radio waves have far lower energy per photon than
the photons of the light that mammals can naturally see. Optical communication
systems use frequencies of electromagnetic waves that are far higher than the
frequencies of radio waves, but lower than the frequencies of X-rays.
The energy of a photon is calculated by using the formula
Photon_energy_in_J = frequency_in_Hz * Planck_Constant ~
~ frequency_in_Hz * 6.626*(10^34) J/Hz
Key-phrases for Fossilrepository search engine: optical links, optical
networks, optical relays, optical relay stations .
References
Attachments:
- 1982_xx_xx_TTÜM_F_5969_001_TPI_raadiotehnika_kateedris_valmistatud_lasersidesüsteem.jpg added by martin_vahi on 2020-05-30 02:23:34. [details]
- TTÜM_F_6827_001_TPI_raadiotehnika_kateedri_optiline_sidesüsteem.jpg added by martin_vahi on 2020-05-30 02:19:37. [details]