Satellite TV is broadcast from satellites that orbit 37,000 kmkm above the earth's surface. Their antennas broadcast a 15 kWkW microwave signal that covers most of North America, an area of about 2.5×107km22.5×107km2.   What is the total power that strikes a 90-cmcm-diameter ground-based dish antenna?   The dish antenna focuses the incoming wave to a 1.0 cm2cm2 area. What is the amplitude of the electric field at this focus?

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Q: The antenna for an AM radio station is a 77.5-m-high tower whose height is equal to one-quarter the…

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Q: What is the frequency of infrared light emitted by an LED in a remote control with a wavelength of…

A: GivenSpeed of light is given as c= 3.00 x 108m.s-1Wavelenth of light is λ=906nm

Q: An FM broadcast station has a transmitting antenna located 50 m above average terrain. How far away…

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Q: A certain electromagnetic field traveling in glass has a maximum electric field of 1,204 V/m. What…

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Q: Electromagnetic radiation from a 4.9-mW laser is concentrated on a 0.75-mm2 area. Part (a) What…

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Q: Which statement about the electromagnetic spectrum and waves is correct? O Electromagnetic waves…

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Q: The antenna for an AM radio station is a 78.5-m-high tower whose height is equal to one-quarter the…

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Q: In North America, broadcast channels are numbered 2 through 69, and each has an associated frequency…

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Q: A traveling electromagnetic wave in a vacuum has an electric field amplitude of 73.3 V/m. Calculate…

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Q: A possible means of space flight is to place a perfectly reflecting aluminized sheet into orbit…

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Q: What is the frequency of a microwave in free space whose wavelength is 1.20 cm ?

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Q: The antenna for an AM radio station is a 73.5-m-high tower whose height is equal to one‑quarter the…

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Q: A signal from of PLDT-Fibr travels through its optic cable at the speed of (2x108 m/s). a.) How long…

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Q: What is the frequency of a microwave in free space whose wavelength is 1.65 cm?

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Q: Satellite TV is broadcast from satellites that orbit the earth. Their antennas broadcast a 15 kW…

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Q: A microwave source produces pulses of 21.0 GHz radiation, with each pulse lasting 1.00 ns. A…

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Q: A radio transmitter broadcasts 4.5 kW of power to a 3.2 m diameter ceceiver.   Calculate the…

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Q: An electromagnetic wave has a frequency of 12 MHz. What is its wavelength in vacuum?

A: λ=cf

Q: 50 x 10³ W/m², Wh-

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Q: Infared light has a lower frequency than visible light.  What is the frequency of IR light that has…

A: Given:Wavelength of IR light, λ = 680 nmVelocity of light, c = 3 X 108 m/s

Stretched string

A stretched string is a wire which is made up of any metal that must have a larger length compared to its thickness. The ends of the wire are fixed, and when they oscillate or are plucked, it produces two reflected transverse waves of the same frequency and same amplitude. The waves or pulses are traveling in alternate directions and superimpose with one another. This waveform is named standing or stationary waves.