Very High Frequency (VHF) waves have which type of wavelengths?

Very High Frequency (VHF) waves are part of the radio frequency spectrum, with frequencies ranging from 30 MHz to 300 MHz. The wavelength of a wave is inversely proportional to its frequency, which means that higher frequency waves have shorter... Read More

1 PHYSICS MCQS

Very High Frequency (VHF) waves have which type of wavelengths?

  • Shorter
  • Shortest
  • Longer
  • Longest
Correct Answer: A. Shorter

Detailed Explanation

Very High Frequency (VHF) waves are part of the radio frequency spectrum, with frequencies ranging from 30 MHz to 300 MHz. The wavelength of a wave is inversely proportional to its frequency, which means that higher frequency waves have shorter wavelengths compared to lower frequency waves.


VHF waves, due to their relatively high frequency, have shorter wavelengths, typically ranging from 1 meter to 10 meters. This makes them suitable for line-of-sight (LOS) communication, as they travel mostly in straight lines and are less affected by the curvature of the Earth compared to lower frequency waves. VHF is widely used in FM radio, television broadcasting, air traffic communication, and marine communication.


In contrast, waves with lower frequencies, such as Very Low Frequency (VLF) or Low Frequency (LF) waves, have longer wavelengths that can travel long distances by bending around obstacles or following the Earth’s curvature. Ultra High Frequency (UHF) waves, which are even higher than VHF, have even shorter wavelengths, typically a few decimeters, and are suitable for applications like mobile phones, GPS, and Wi-Fi.


Understanding the relationship between frequency and wavelength is essential in physics and communication studies, as it determines how different types of electromagnetic waves are used for specific applications. Higher frequencies allow for higher data transmission rates but usually require line-of-sight paths, whereas lower frequencies can travel farther and penetrate obstacles.


In summary, VHF waves have shorter wavelengths due to their high frequency. This characteristic makes them ideal for radio and television broadcasting, air and marine communication, and other applications that require reliable line-of-sight transmission.




 

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