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Why can some am broadcasts be heard for great distances under certain conditions?
Wiki User
∙ 14y ago
AM radio waves bounce off the ionosphere. Favorable weather conditions and lack of sunspot activity enhance the waves' ability to bounce between the earth's surface and atmosphere, allowing the broadcast to travel a greater distance.
Wiki User
∙ 14y ago
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Waves transport what over great distances?
solids
What do waves transport over great distances out of solids gases liquids and energy?
energy
Why can AM broadcasts be heard for greater distances under certain conditions?
You can hear AM stations farther away more at night due to a condition known as SKIP, or Skywave Propagation. The propagation of AM radio waves changes drastically from daytime to nighttime. This change in AM radio propagation occurs at sunset due to radical shifts in the ionospheric layers, which persist throughout the night. During daytime hours when ionospheric reflection does not occur to any great degree, AM signals travel principally by conduction over the surface of the earth. A condition known as "groundwave" propagation. Useful daytime AM service is generally limited to a radius of no more than about 100 miles, even for the most powerful stations. However, during nighttime hours the AM signals can travel over hundreds of miles by reflection from the ionosphere, a phenomenon called "skywave" propagation. Basically the AM signal bounces off the ionosphere back to the earth rather than traveling in a direct line. This bounce allows the signal to be heard over vast distances. Amateur radio operators call this talking skip.
Why gravity is the powerful force in nature?
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How does weight affect a glider?
Weight is the main factor in the flight of the glider. More weight means the glider does not fly great distances. If the weight is less it will travel more distance.
What is visible from great distances?
The stars.
Why do animals migrate great distances every year?
animals migrate from distances is because they hide their food in different places that is why they migrate from distances
How can species richness affect community stability?
Having a variety of species in a community is great, but the downside is that if a community just keeps conditions the same, some species need different conditions in order to survive. But on the other hand, some species will grow in large numbers if their certain conditions are kept the same.Having a variety of species in a community is great, but the downside is that if a community just keeps conditions the same, some species need different conditions in order to survive. But on the other hand, some species will grow in large numbers if their certain conditions are kept the same.
Why is electricity such a use ful form of energy?
Electricity is easy to transport over great distances; and it is easy to convert into other forms of energy.Electricity is easy to transport over great distances; and it is easy to convert into other forms of energy.Electricity is easy to transport over great distances; and it is easy to convert into other forms of energy.Electricity is easy to transport over great distances; and it is easy to convert into other forms of energy.
Does carbon crystallize to form diamonds?
Under certain conditions of heat and great pressure, yes. Diamond is one form of crystallized carbon.
Can currents carry water great distances?
YES, they can.
Waves transport what over great distances?
solids
Why did imigrants choose mules and oxens to pull wagons?
Mules and oxen are very strong, very sturdy creatures, making them ideal for pulling great amounts of cargo over long distances in harsh conditions.
Which animal can cover great distances without water?
Camel.
How do people travel great distances today?
Generally, by air.
Is it true that currents can carry water great distances?
yes
Can cows swim?
Yes, they can swim but not great distances.
