SCIENCE
UNITS ABBREVIATIONS INVENTIONS DISCOVERIES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Very Hot Frequency
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Very Hot Force
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Very Heavy Frequency
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Very High Force
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Detailed explanation-1: -Very high frequency (VHF) refers to the radio frequency electromagnetic waves ranging from 30 to 300 MHz with corresponding wavelengths ranging from 1 m to tens of meters.
Detailed explanation-2: -Radio frequency range from 30 MHz to 299 MHz. The sub-bands most commonly used by fire are: VHF-FM Lo band: Frequency Modulation 30 MHz-80 MHz, of which fire frequencies are between 30 MHz and 50 MHz.
Detailed explanation-3: -VHF signals cover 2 frequency bands. The Low-VHF band covers channels 2-6 and the High-VHF band covers channels 7-13. Because these signal wavelengths are longer than UHF signals, they can more easily bend over and around certain obstructions in the terrain between the TV broadcast tower and the receiving TV antenna.
Detailed explanation-4: -UHF stands for “Ultra High Frequency” while VHF stands for “Very High Frequency.” UHF can range from low band (378-512 MHz) to high band (764-870 MHz) while VHF ranges from low band (49-108 MHz) to high band (169-216 MHz). MHz stands for Megahertz and measures the speed of electronic devices.