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  2. Sporadic E propagation - Wikipedia

    en.wikipedia.org/wiki/Sporadic_E_propagation

    Sporadic E usually affects the lower VHF band I (TV channels A2–A6, E2–E4, and R1–R5) and band II (88–108 MHz FM broadcast band). A 1945 FCC engineering study concluded that E s caused interference issues 1% of the time for a station broadcasting at 42 MHz, but only 0.01% for one at 84 MHz.

  3. Electromagnetic spectrum - Wikipedia

    en.wikipedia.org/wiki/Electromagnetic_spectrum

    A diagram of the electromagnetic spectrum, showing various properties across the range of frequencies and wavelengths. The electromagnetic spectrum is the full range of electromagnetic radiation, organized by frequency or wavelength. The spectrum is divided into separate bands, with different names for the electromagnetic waves within each band.

  4. Beta wave - Wikipedia

    en.wikipedia.org/wiki/Beta_wave

    Beta waves, or beta rhythm, are neural oscillations (brainwaves) in the brain with a frequency range of between 12.5 and 30 Hz (12.5 to 30 cycles per second). Several ...

  5. Television channel frequencies - Wikipedia

    en.wikipedia.org/wiki/Television_channel_frequencies

    FM channel 200, 87.9 MHz, overlaps TV 6. This is used only by K200AA.; TV 6 analog audio can be heard on FM 87.75 on most broadcast radio receivers as well as on a European TV tuned to channel E4A or channel IC, but at lower volume than wideband FM broadcast stations, because of the lower deviation.

  6. List of Spectrum original programming - Wikipedia

    en.wikipedia.org/wiki/List_of_Spectrum_original...

    Previous channel Premiere Seasons Runtime Status Mad About You (season 8) Sitcom: NBC: November 20, 2019: 1 season, 12 episodes: 22–26 min. Ended Manhunt (season 2) True crime anthology: Discovery Channel: February 3, 2020: 1 season, 10 episodes: 40–42 min. Ended

  7. Spectrum cable introduces a new souped-up ‘cable box.’ What ...

    www.aol.com/spectrum-cable-introduces-souped...

    Charter’s Spectrum Cable has announced changes for the way its customers can access video content going forward — both the shows they watch on television and the shows they stream. Currently ...

  8. Spectrum (physical sciences) - Wikipedia

    en.wikipedia.org/wiki/Spectrum_(physical_sciences)

    The microwave spectrum corresponds to frequencies between 300 MHz (0.3 GHz) and 300 GHz and wavelengths between one meter and one millimeter. [5] [6] Each broadcast radio and TV station transmits a wave on an assigned frequency range, called a channel. When many broadcasters are present, the radio spectrum consists of the sum of all the ...

  9. Lyman series - Wikipedia

    en.wikipedia.org/wiki/Lyman_series

    The spectrum of radiation emitted by hydrogen is non-continuous or discrete. Here is an illustration of the first series of hydrogen emission lines: The Lyman series. Historically, explaining the nature of the hydrogen spectrum was a considerable problem in physics.