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1) What is the wavelength for an FM radio signal that has a frequency of 107.8 MHz? (
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- A) Suppose a star is 4.15 ✕ 1018 m from Earth. Imagine a pulse of radio waves is emitted toward Earth from the surface of this star. How long (in years) would it take to reach Earth? B) The Sun is 1.50 ✕ 1011 m from Earth. How long (in minutes) does it take sunlight to reach Earth? C) The Moon is 3.84 ✕ 108 m from Earth. How long (in s) does it take for a radio transmission to travel from Earth to the Moon and back?(a) Suppose a star is 7.61 ✕ 1018 m from Earth. Imagine a pulse of radio waves is emitted toward Earth from the surface of this star. How long (in years) would it take to reach Earth? years (b) The Sun is 1.50 ✕ 1011 m from Earth. How long (in minutes) does it take sunlight to reach Earth? minutes (c) The Moon is 3.84 ✕ 108 m from Earth. How long (in s) does it take for a radio transmission to travel from Earth to the Moon and back? s(a) Suppose a star is 8.59 x 1018 m from Earth. Imagine a pulse of radio waves is emitted toward Earth from the surface of this star. How long (in years) would it take to reach Earth? years (b) The Sun is 1.50 x 1011 m from Earth. How long (in minutes) does it take sunlight to reach Earth? minutes (c) The Moon is 3.84 x 108 m from Earth. How long (in s) does it take for a high-intensity laser beam to travel from Earth to the Moon and back?
- The frequency range for AM radio is 540 to 1600 kHz. The frequency range for FM radio is 88.0 to 108 MHz. Part (a) Caculate the maximum AND minimum wavelength for AM radio in meters. Part (b) Caculate the maximum AND minimum wavelength for FM radio in meters.The frequency range for AM radio is 540 to 1600 kHz. The frequency range for FM radio is 88.0 to 108 MHz. Part (a) Caculate the maximum wavelength for AM radio in meters. Part (b) Caculate the minimum wavelength for AM radio in meters. Part (c) Caculate the maximum wavelength for FM radio in meters. Part (d) Caculate the minimum wavelength for FM radio in meters.An FM radio station broadcasts at a frequency of 91.5 MHz. If you drive your car toward thestation at 26.1 m>s, what change in frequency do you observe?
- (a) The distance to a star is approximately 4.94 ✕ 1018 m. If this star were to burn out today, in how many years would we see it disappear? years(b) How long does it take sunlight to reach Earth? minutes(c) How long does it take for a microwave radar signal to travel from Earth to the Moon and back? (The distance from Earth to the Moon is 3.84 ✕ 105 km.) s(a) The distance to a star is approximately 4.97 × 10¹8 m. If this star were to burn out today, in how many years would we see it disappear? years (b) How long does it take sunlight to reach Earth? minutes (c) How long does it take for a microwave radar signal to travel from Earth to the Moon and back? (The distance from Earth to the Moon is 3.84 x 105 km.) S(a) The distance to a star is approximately 5.50 × 10¹8 m. If this star were to burn out today, in how many years would we see it disappear? 581.35 years (b) How long does it take sunlight to reach Earth? 8.33 minutes (c) How long does it take for a microwave radar signal to travel from Earth to the Moon and back? (The distance from Earth to the Moon is 3.84 x 105 km.) X 1.28 Your response differs from the correct answer by more than 10%. Double check your calculations. S
- 1)How long does it take a radio signal from Earth to reach the Moon, which has an orbital radius of approximately 3.84×10^8 m? (Express your answer to three significant figures.)2) A radio antenna broadcasts a 1.0 MHz radio wave with 30 kW of power. Assume that the radiation is emitted uniformly in all directions What is the wave intensity 27 km from the antenna? O 190.42 * 10^-6 W/m^2 O 9.2 * 10^-6 W/m^2 O 910.99 * 10^-6 W/m^2 O 3.27 * 10^-6 W/m^2Infrared radiation from young stars can pass through the heavy dust clouds surrounding them, allowing astronomers here on Earth to study the earliest stages of star formation, before a star begins to emit visible light. Suppose an infrared telescope is tuned to detect infrared radiation with a frequency of 3.30 THz. Calculate the wavelength of the infrared radiation. Be sure your answer has the correct number of significant digits.