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The half period zone is provided by an optical device known as Zone plate,The zone plate is so called because it is constructed following Fresnel zone law.It is simply a plane parallel glass plate having concentric circles of radii accurately proportional to the square roots of the consecutive natural numbers 1,2,3......etc. The even or odd order annular space between the circles are completely dark.
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A wave front has the form of a what?
A wave front is an imaginary surface corresponding to the points of a wave that vibrate in unison. The can be of three types namely spherical, cylindrical or plane.
What will be the shape of wave front of light coming from a point source place at infinity?
plane wavefront
If a radio wave has a period of 1 us what is the waves period in seconds?
If a radio wave has a period of one then the period wave or two would be 2. This is math.
What is the sound barrier?
going faster than the speed of sound. It is a pressure wave of air that builds up in front of a plane, preventing it from going faster.
How does wave speed relate to wavelength and period?
Wave speed = (wavelength)/(period)
A wave front has the form of a what?
A wave front is an imaginary surface corresponding to the points of a wave that vibrate in unison. The can be of three types namely spherical, cylindrical or plane.
What will be the shape of wave front of light coming from a point source place at infinity?
plane wavefront
What is ground plane?
A ground plane is use in radio where the wave length is less than 1 half wave. It produced a false ground (Earth plane) making an image of a 1/4 wave signal reflect on to the aerial creating a half wave image. This improves the efficiency or the aerial, extending it's range. Ground planes are used when the wavelength if the aerial is short or when the earth does not provide a good enough electrical path to ground. They can also be used to distort the polar pattern of the signal.
What is the function of a capacitor in the half wave rectification?
to smooth the output of the half-wave rectifier from 1/2 an AC cycle per period to a constant voltage.
Comparision between half wave and full wave rectifier?
A half wave rectifier conducts on every other cycle. The output is a train of half sine cycles, at a period equal to the input period. At 60 Hz, the period is 16.7 ms. Each half cycle (8.3 ms) will be interleaved with periods (8.3 ms) of no voltage. If you filter the output with a capacitor, you get DC - at no load, the DC will be the peak value less the forward bias voltage of the diode - at some load, the DC will fluctuate between that peak value and some value dependent on the size of the capacitor and the current draw. Again, the period (of this nearly sawtooth waveform) will be the input period. A full wave rectifier conducts on every cycle. The output is a train of half sine cycles, at a period equal to half the input period. At 60 Hz, the period is 8.3 ms. Each cycle (8.3 ms) will be connected to the preceding cycle with no intervening delay. Each cycle will pulse in the same direction, instead of in alternating directions. If you filter the output with a capacitor, you get DC - at no load, the DC will be the peak value less the forward bias voltage of the diode - at some load, the DC will fluctuate between that peak value and some value dependent on the size of the capacitor and the current draw. Again, the period (of the nearly sawtooth waveform) will be half the input period. Since the full wave output waveform is twice the frequency (half the period) of the half wave output, the capacitor can be about half its required value for the half wave circuit in order to achieve the same level of filtering.
The time it takes two successive crests of an ocean wave to pass a given point is called a?
A wave length.
What is the reciprical of the period of a sound wave?
The reciprocal of the period of ANY wave is the wave's frequency.
If a radio wave has a period of 1 us what is the waves period in seconds?
If a radio wave has a period of one then the period wave or two would be 2. This is math.
What the sound barrier?
going faster than the speed of sound. It is a pressure wave of air that builds up in front of a plane, preventing it from going faster.
What is the sound barrier?
going faster than the speed of sound. It is a pressure wave of air that builds up in front of a plane, preventing it from going faster.
How do wave frequency and period of a wave relate?
Wave frequency f, and period of wave T are inverses, related by fT=1.
What are principal planes in antenna wave propagation?
The principal plane in wave propagation is the E-plane and the H-plane of an antenna. The E-plane consists of the electric field vector, and by convention, it's the direction in which the wave is said to be 'polarized'. The H-plane consists of magnetic field vector of the wave. The electric field vector and the magnetic field vector are perpendicular to each other, and the direction in which the wave propagates (moves) is perpendicular to both of them.
