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प्रश्न
State three components of space wave propagation.
उत्तर
The space wave has three components:
(a) Direct wave : Along path (a), radio waves reach receiving antenna directly.
(b) Ground reflected wave: The radio waves reach the receiving antenna after reflection
from ground.
(c)Tropospheric wave: The radio waves reach the receiving antenna after reflection from
troposphere
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संबंधित प्रश्न
Line of sight propagation is also called as_________________ .
What is space wave propagation?
The outermost layer of the earth’s atmosphere is _______.
(A) stratosphere
(B) mesospher
(C) troposphere
(D) ionosphere
What is space wave propagation?
State the factors which limit its range of propagation
Is it necessary for a transmitting antenna to be at the same height as that of the receiving antenna for line-of-sight communication? A TV transmitting antenna is 81m tall. How much service area can it cover if the receiving antenna is at the ground level?
Explain why ground wave communication mode cannot be used for long-distance communication using high frequencies
The reflected waves from an ionosphere are _____.
(a) ground waves
(b) sky waves
(c) space waves
(d) very high-frequency waves
Explain why this mode cannot be used for long distance communication using high frequencies.
Describe briefly, by drawing suitable diagram, the sky wave ?
Describe briefly, by drawing suitable diagram, the space wave modes of propagation. Mention the frequency range of the waves in these modes of propagation ?
What is ground wave communication? On what factors does the maximum range of propagation in this mode depend?
Propagation of Electromagnetic Wave?
Answer the following question.
On what factors does the range of coverage in ground wave propagation depend?
Light from a sodium lamp (S) passes through two polaroid sheets P1 and P2 as shown in fig. What will be the effect on the intensity of the light transmitted (i) by P1 and (ii) by P2 on the rotating polaroid P1 about the direction of propagation of light? Justify your answer in both cases.
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Explain the ground wave propagation and space wave propagation of electromagnetic waves through space.
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The wavelength of electromagnetic wave employed in space communication very over a range of
An antenna is
The Q of a resonant transmission line is
The characteristic impedance of a coaxial cable is of the order of
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- 100 km
- 24 km
- 55 km
- 50 km
A 50 MHz sky wave takes 4.04 ms to reach a receiver via re-transmission from a satellite 600 km above earth’s surface. Assuming re-transmission time by satellite negligible, find the distance between source and receiver. If communication between the two was to be done by Line of Sight (LOS) method, what should size and placement of receiving and transmitting antenna be?
