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प्रश्न
Answer briefly.
What are EM waves?
उत्तर
Waves that are caused by the acceleration of charged particles and consist of electric and magnetic fields vibrating sinusoidally at right angles to each other and to the direction of propagation are called EM waves or EM radiation.
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संबंधित प्रश्न
Choose the correct option.
The maximum distance up to which TV transmission from a TV tower of height h can be received is proportional to
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If a TV telecast is to cover a radius of 640 km, what should be the height of the transmitting antenna?
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How are EM waves produced?
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How does the effective power radiated by an antenna vary with wavelength?
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Why should broadcasting programs use different frequencies?
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In an EM wave, the electric field oscillates sinusoidally at a frequency of 2 × 1010 Hz. What is the wavelength of the wave?
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A TV tower has a height of 200 m. How much population is covered by TV transmission if the average population density around the tower is 1000/km2? (Radius of the Earth = 6.4 × 106 m)
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Height of a TV tower is 600 m at a given place. Calculate its coverage range if the radius of the Earth is 6400 km. What should be the height to get the double coverage area?
