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What kind of radio waves can bounce off the ionosphere to extend their range?
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What would happen if the ionosphere disappeared?
One significant effect would be that long range radio communication by shortwave would be impossible.
What is the altitude of ionosphere?
the ionosphere extends from around 50 km altitude to about 1000 km, Within this range are the the various regions that make it up; D, E, F1, F2 and the topside, with the D region closest to us and the topside farthest from us, and in that order. the topside can also extend to about 2000km in some part of the earth.
What technologies allowed radio signals to reach a wider geographical range?
satellite
What are the names of the suns rays?
Rays is the radiation. The name of rays is classified by the range of radiation wavelength and Radiation from the sun cover wide range or radiation. Sunlight at source had some little fraction of X-ray, Ultraviolet that would be absorbed by Ozone,Visible light, Infrared, Microwave down to the radio wave.
Why are satellite dishes white and not mirrored?
Well, the satellite dishes in my area are mostly grey, not white - but to the question - why painted and not mirrored?. The wavelengths that need reflecting by the parabolic mirror of the satellite dish are in the microwave range - a millimetre or so. So, the dish need only be smooth compared to that length, and a paint finish meets that standard, though of course, most of the reflection is done by the metal of the dish. The paint need not be radio-conductive or radio-reflective. Were the dish needed to operate in the optical range, then indeed, a mirror finish would be needed.
Why does the range of radio waves increase at night?
If you mean short waves, the answer is that the lower layer of the ionosphere (D layer) dissapears at night so short wave signals then bounce off a higher layer (F1 or F2) of the ionosphere and can travel further.
What keeps radio waves and such from soaring off of earth into space?
Actually, radio waves do go out into space. However, depending on frequency, they do tend to bounce off of the ionosphere, which is why lower frequency waves such as AM and longwave have greater (on Earth) range than higher frequency waves, such as FM or microwave.
Does the full carrier AM have any advantage?
The advantages are mostly in range.. AM uses lower frequencies which bounce off the ionosphere, thus reducing the line of sight limitation.
What would happen if the ionosphere disappeared?
One significant effect would be that long range radio communication by shortwave would be impossible.
Why the range of AM is more than that of FM?
A.M. tends to hug the earth some and can bounce off the ionosphere. F.M. tends to go straight off into space thus it is hard to pickup at a distance.
Why is the ionosphere important to radio wave transmission?
Sky wave propagation is possible because of ionosphere. Ionosphere is the region consisting of ions produced in the higher level of atmosphere almost at a height of 90km. The scientific fact is that the refractive index is inversely related to the ionic density. Because of various concentration of ions in the ionosphere, the refractive index is different. As radio waves make an entry through this region, the ray has to pass from the region of higher refractive index to lower, so the radio waves get deviated from the normal. So stage by stage, the radio waves get turned back towards the earth. This seems as if it has been reflected by the ionospheric layer. So short waves, also known as sky waves, with a range of frequency 3 to 30 MHz are better sent back to the earth. That is why irrespective of the curvature of the earth, the signals transmitted at London will be received by a radio in a town in TamilNadu, India.
What layer of the atmosphere has the greatest range?
The layer that has the greatest range is the ionosphere.
Why is Radio Frequency used in mobile communication?
the frequency used in mobile communication should be greater then 30mhz so cannot be reflected by the ionosphere thats why we are using a frequency of range less ghz so called "radio waves"
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.
What is the altitude of ionosphere?
the ionosphere extends from around 50 km altitude to about 1000 km, Within this range are the the various regions that make it up; D, E, F1, F2 and the topside, with the D region closest to us and the topside farthest from us, and in that order. the topside can also extend to about 2000km in some part of the earth.
Why are short-waves used in long distance broadcasrs?
Long-distance radio waves are particularly affected by the E and F layers of Earth's ionosphere, causing them to be refracted and reflected back to Earth at a much farther distance or range than they would travel along the Earth's surface. The Earth's surface often reflects the radio waves back up to the ionosphere, where they are again refracted and reflected back to Earth, adding another large distance to their range
How do CB skip work?
There's a level of the Earth's atmosphere called the ionosphere. Read the article on Wikipedia if you want specifics about that. Anyhow, the ionosphere can generally reflect radio signals of a frequency lower than 30 MHz back to earth... HF, VHF, UHF frequencies generally go right through it, which is why the line of sight limitation exists for these frequencies. CB radio runs in the 28-29 MHz range
