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Yes, the line of sight is the direct free-space path that exists between two points. Using binoculars on a clear day, it is easy to determine if visual line of sight exists between two points that are miles apart
Wiki User
∙ 11y ago
Wiki User
∙ 14y agoThe absorption of radio waves by solid objects depends on their frequency (wavelength).
As frequency increases (wavelength decreases), solid objects absorb more of the radiation,
and line of sight becomes increasingly necessary for the communication.
This is a fancy way of reminding you that you can use your AM radio in the basement, but your
FM radio and your TV don't work so well down there, and you can't see the light of the sun at all
through the basement walls or ceiling.
Wiki User
∙ 11y agoNo- a big benefit of RFID is that is does not require line-of-sight transmission like barcodes. RFID tags can be read much faster than barcodes because of this.
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Why is the height a vhf radio antenna important?
VHF signals are essentially Line of sight transmissions (LOS). Like all radio waves they are attenuated by objects in their path. Raising the aerial above the level of the interferring objects while still maintaining an integral waveform (Usually using an artificial ground plane or aerials less than 1/2 lambna), reduces the attenuation and prevents distortion of the polarization pattern thus leading to an efficient transmission path.
Why is height of the VHF radio antenna important?
VHF radios work by the line of sight principle
What uses radio waves to transmitt data signals over short distance and is hampered by needing a direct line of sight?
bluetooth
What uses radio waves to transmit data signals over short distances and does not need a direct line of sight?
WiFi modems, highway toll transponders, and Bluetooth® thingies do that.
What uses radio waves to tansmit data signals over short distances and does not need a direct line of sight?
When you ask somebody to pick out the correct answer for you from a list, it would be just plain common courtesy to let him see the list.
Why is the Height of VHF radio important?
Because VHF signals have a line of sight limitation.
Why is the height a vhf radio antenna important?
VHF signals are essentially Line of sight transmissions (LOS). Like all radio waves they are attenuated by objects in their path. Raising the aerial above the level of the interferring objects while still maintaining an integral waveform (Usually using an artificial ground plane or aerials less than 1/2 lambna), reduces the attenuation and prevents distortion of the polarization pattern thus leading to an efficient transmission path.
Why is height of the VHF radio antenna important?
VHF radios work by the line of sight principle
What uses radio waves to transmitt data signals over short distance and is hampered by needing a direct line of sight?
bluetooth
Why is the heights of a VHF radio antenna important?
VHF signals are essentially Line of sight transmissions (LOS). Like all radio waves they are attenuated by objects in their path. Raising the aerial above the level of the interferring objects while still maintaining an integral waveform (Usually using an artificial ground plane or aerials less than 1/2 lambna), reduces the attenuation and prevents distortion of the polarization pattern thus leading to an efficient transmission path.
Can Hawaii radio 105.1 be heard on a shortwave radio in California?
No - they're on entirely different wavelengths. 105.1 is VHF radio, which penetrates through the ionosphere, and creates a line-of-sight limitation. Shortwave receives Medium- and High Frequency transmissions from 1.8 to 30 MHz - well below the range of VHF radio.
Which atmosphere layer contains electrically charged particles that radio waves?
The ionosphere. To clarify, only the low-frequency radio waves incorrectly called "high-frequency" or "HF" of about 50MHz and below are reflected. "Very High Frequency" VHF signals are not reflected, but go straight off into space. For example, in the "AM" commercial broadcast spectrum, the transmission is reflected back to the Earth and is receivable for great distances, a phenomenon that used to be called "skip". AM signals are in the band of 550KHZ to 1.6 MHz. "FM" stations in the band from 88MHz to 108MHz are only received by "Line of sight" transmissions.
What uses radio waves to transmit data signals over short distances and does not need a direct line of sight?
WiFi modems, highway toll transponders, and Bluetooth® thingies do that.
Why is the area of coverage for AM radio greater than FM radio?
The basic reason is that AM radio is broadcast on a lower frequency, while FM is broadcast on a higher frequency. And the lower frequency signals will curve around the earth a bit more than the higher frequency FM signals. FM is considered more "line of sight" than AM, which has that "fat" ground wave that hugs the earth a bit more.
What systems sends out electrical signals in response to sight or sound?
nervous system
What uses radio waves to tansmit data signals over short distances and does not need a direct line of sight?
When you ask somebody to pick out the correct answer for you from a list, it would be just plain common courtesy to let him see the list.
What do radio waves bounce off?
Radio waves are reflected by many solid objects, such as wood, stone, and notably metal, allowing the use of microwaves in radar applications.Also importantly in broadcast radio, the ionosphere (an upper layer of the Earth's atmosphere) can bounce signals back down to locations beyond the line-of-sight horizon.
