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When the amplitudes of the transmitted and reflected waves are?
When the amplitudes of the transmitted and reflected waves are equal, it means that half of the incident wave energy is being transmitted and half is being reflected at the interface between the two media. This occurs at the Brewster angle when the reflected wave is completely polarized perpendicular to the plane of incidence.
How long does it take for radio waves to reach the moon?
A little less than one and a half seconds.
What does simplex and half-duplex mean?
In radio communications they refer to systems where information may be transmitted in both directions, but only in one direction at a time
What are some natural sources of radio waves?
We generally think of radio waves (radio electromagnetic radiation) as those frequencies of electromagnetic (EM) radiation that fall within a band of frequencies below those of light. These include microwave bands, on which satellites communicate and cell phone operate, as well as the familiar microwave oven. Radar also operates in this band. Below that we find television signals, as well as some two-way radio signals. Other forms of communications radio signals (like amateur or "ham" radio) as well as broadcast radio operate below the television bands. By considering the types of equipment mentioned above, it is possible to make a list of some sources of radio electromagnetic radiation.
Why isn't necessary for radio telescopes surface to be as smooth as mirrors?
The reflector of your telescope's mirror DOES need to be finely polished, with no disturbances bigger than a half-wavelength or so. So for optical telescopes, the mirror must be smooth to nanometers. But for a radio telescope which measures wavelengths in meters or centimeters, a fine wire mesh will generally do the trick. And since radio telescopes tend to be very large, the finer the mesh the lighter the dish can be - and therefore, more easily rotated and pointed.
To find the distances between two distant objects without the use of trigonometry?
It depends on the objects, how far apart they are and whether or not one can be seen from the other. If they are moderately far apart, echo location (sonar or radar) located at one of the objects can be used. A beam of radio or sound waves is aimed at the object and the time taken to receive an echo is measured. Since the speed of radio waves or sound waves in the relevant medium is known, the distance travelled by these waves can be calculated. The distance to the object is then half the calculated distance (the waves have to go there and come back).
Why is there a time delay in receiving radio transmissions in the UK from Australia?
There is time delay because the radiotransmissionsare not instant; they may travel at the speed of light but that is notinstantaneous. Also, the radio waves have to travel up to asatellite, as the waves cannot go through the Earth.
Where do water waves become shallow water waves?
when waves reach shallower the one half their wave length they begin to interact with the ocean floor
What is the length of an antenna one-half wavelength long for sending radio at 300 hz?
The formula to calculate the length of an antenna is: Length (in meters) = (Speed of Light / Frequency) / 2. Plugging in the values for radio waves at 300 Hz: we get Length = (299,792,458 m/s / 300 Hz) / 2 = 499,654.43 meters.
Is the mantle's outermost layer liquid?
no but yes.It is a half liquid and a half solid.It waves out rocks mixed with lava.So it is said to be a half liquid and a half solid.
How is the spacing of the water waves related to wavelength?
The spacing of water waves is half of the wavelength. This means that the distance between two adjacent wave crests or troughs is equal to half of the wavelength of the wave.
When deep water waves reach water shallower than one half of their wavelength they become what water waves?
When deep water waves approach water shallower than half their wavelength, they are transformed into shallow water waves. These waves have shorter wavelengths and slower speeds due to interacting with the sea floor, causing their amplitudes to increase as the water becomes shallower.
