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the ionised particles serround the earth.these particles are like a layer and reflacts radiowave back to earth.in this way,short wawes are "hopping" from the tranmitter to a very long distance.note that this reception is not always very stable as the layer "mooves"because of the vereation of temperature and sun spot activities.
What else can I help you with?
What is the difference between am and shortwave?
AM stands for amplitude modulation (the kind used in the am broadcast band and also on the shortwave bands).The shortwave bands begin just a little higher than the top of the am broadcast band and go up to 30000 KHz. The am broadcast band is from 530 to 1700 KHz and shortwave broadcast bands begin about 2000 KHz. The programming on shortwave stations is many types such as cultural,news,science,and just about anything about the country which the station is broadcasting from.Between the shortwave broadcast bands you can also hear amateur radio operators,military,utility stations,radio beacons,pirate broadcasters,radio telephone,aircraft, radio teletype,and lots more.The higher bands (above about 9000KHz) are daytime bands because the signals there propagate around the world in the daytime and the lower bands below about 9000 KHz are nighttime bands and you listen there from about sunset to sunrise.I could go on forever but that is probably about as you want to know about it unless you have ever listened, once you have experienced shortwave listening when conditions are right, you will be hooked on a great hobby.
How fast are microwaves signals in air?
Microwave signals travel at the speed of light in air, which is approximately 299,792,458 meters per second. This high speed allows microwave signals to transmit data rapidly over long distances.
A form of transmission that allows multiple signals to travel simultaneously over one medium is known as?
A form of transmission that allows multiple signals to travel simultaneously over one medium is known as multiplexing
AM signals travel as change in the...?
AM signals travel as changes in the amplitude of the carrier wave. This modulation allows the signal to carry audio information, as variations in the amplitude correspond to the sound waves being transmitted. The frequency of the carrier wave remains constant, while its strength varies to encode the desired information.
How do you FM signals travel?
They travel in a back and forth motion
How far can cellular telephone signals travel?
Cellular telephone signals can travel up to 22 miles.
How do signals from the hypothalamus reach the pituitary gland?
Signals heading to the anterior pituitary travel through the hypophyseal portal vein. Signals heading to the posterior pituitary travel through the pituitary stalk or infindibulum.
Can gps signals travel underwater?
No, GPS signals cannot travel through water. Water is an effective barrier for GPS signals, causing them to weaken and lose accuracy when trying to penetrate underwater. GPS signals are designed to travel through the atmosphere, not through water.
How far can forest fires travel?
If we let them, they can travel for thousands of miles.
How fast do nerve signals travel to the brain?
There are actually different types of afferent fibers and they convey different types of information. For example the fibers that transmit pain signals are relatively slow whereas the fibers that transmit touch signals travel much faster. The conduction velocity (speed), depending on the type of fiber and the conveyed message, will range from 0.6 m/s to 120 m/s.
Is there a Mexican highway to Alaska from Mexico that only Mexicans are allowed to travel on?
No, unless there is a secret underground tunnel that stretches for thousands of miles under the Earth's crust that allows Mexicans to travel under the United States and Canada territories into Alaska.
Why is it possible to transmit TV signals by ground wave propagation?
Ground wave propagation for TV signals is possible because the signals use low frequencies that can travel along the Earth's surface, following its curvature. This allows the signals to reach receivers beyond the line of sight. Additionally, ground waves experience less attenuation compared to higher frequencies, making them suitable for long-distance transmission.
