The peak wavelength in the cosmic microwave background is 1mm. This corresponds to a temperature of...
The peak wavelength in the cosmic microwave background is 1mm. This corresponds to a temperature of about 3K. To what frequency would you need to tune a radio receiver to receive a microwave signal with this wavelength
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The peak wavelength in the cosmic microwave background is 1mm.
This corresponds to a temperature of...
The temperature of the cosmic microwave background (CMB) varies with time. If the peak of the...
The temperature of the cosmic microwave background (CMB) varies with time. If the peak of the CMB was observed to be at 3.5 K, compute the wavelength at which most of the radiation would be emitted. Answer in nm.
1. [Cosmic background temperature] At present, the cosmic background radiation is at 3 K. Suppose...
1. [Cosmic background temperature] At present, the cosmic background radiation is at 3 K. Suppose the universe expands adiabatically (but not necessarily quasistatically). What can you say about the tem- perature of the cosmic background radiation when the total volume of the universe was one half of the present volume?
1. [Cosmic background temperature] At present, the cosmic background radiation is at 3 K. Suppose the universe expands adiabatically (but not necessarily quasistatically). What can you say about the tem-...
10 marks] Question 10 [2 2 2 2 2 The Cosmic Microwave Background (CMB) is blackbody...
10 marks] Question 10 [2 2 2 2 2 The Cosmic Microwave Background (CMB) is blackbody radiation remaining from an hot phase in the universe, and currently has a temperature of 2.7K. First we will determine the current number density of CMB photons. early (a) What is the current energy density of the CMB? (b) What is the average energy of a single photon in the CMB today (at the peak of the blackbody curve)? (c) If we take this...
Please make sure you give me the correct answer 13) The cosmic background radiation permeating the...
Please make sure you give me the correct answer
13) The cosmic background radiation permeating the universe has the spectrum of a 2.7-K blackbody radiator. The energy density of deep space is 4.19 x 10-8 J/cm3 a, What is the peak wavelength of this radiation? b, Assuming the energy density of space is from these photons, how many photons are there on average in each cubic centimeter of space?
What is the temperature If the peak of a blackbody spectrum is at 17.0 m? What...
What is the temperature If the peak of a blackbody spectrum is at 17.0 m? What is the wavelength at the peak of a blackbody spectrum if the body is at a temperature of 1700 K? About 0.1ev is required to break a "hydrogen bond" in a protein molecule. Calculate the minimum frequency and maximum wavelength of a photon that can be accomplish this minimum frequency
According to Wein’s Law, The peak wavelength of radiation emitted is determined by the temperature of...
According to Wein’s Law, The peak wavelength of radiation emitted is determined by the temperature of the emitter according to the following equation. λmax=2900/Twhere T is the temperature of the emitter in degrees Kelvin (water freezes at 273 degrees K, 0 degrees Celsius and 32 degrees Fahrenheit). NASA’s Cassini space probe has made several fly-bys of Saturn’s moon Titan, the only moon with an atmosphere. Here is your problem. Given that Earth’s average temperature is 15 degrees Celsius and Titan’s...
Problem 7 Two microwave frequencies are authorized for use in microwave ovens: 900 MHz and 2,560 ...
i need help with this problems
Problem 7 Two microwave frequencies are authorized for use in microwave ovens: 900 MHz and 2,560 MHz. a) On its highest power setting, a microwave oven can produce 1.00 kW of power onto a 30.0 by 40.0 cm area. What is the intensity in W/m2? b) Calculate the peak electric and magnetic field strength in these waves. c) The maximum safe intensity of microwaves for human exposure is 1.00 W/m. If a radar unit...
An AC antenna creates radio waves having a wavelength equal to 2.50 m. To test the...
An AC antenna creates radio waves having a wavelength equal to 2.50 m. To test the signal strength, a small detector is placed immediately next to the antenna. (a) What is the frequency of the antenna's AC source? (b) If the detector is circular with radius equal to 5 cm and measures a total energy of 120 J in 10 s, what is the peak electric field of the radio waves? Prove that the image you see of yourself in...
What frequency would you need to produce a sound wave in room-temperature air with a wavelength...
What frequency would you need to produce a sound wave in room-temperature air with a wavelength of 4m? _______ Hz
1. If the electric field in an EM wave in free space has a peak magnitude...
1. If the electric field in an EM wave in free space has a peak magnitude of 8.7×10−5V/m, what is the peak magnitude of the magnetic field strength? B0 = _________ T 2. A 1500-nF capacitor with circular parallel plates2.0 cm in diameter is accumulating charge at the rate of 39.0 mC/s at some instant in time. a) What will be the induced magnetic field strength 12.5 cm radially outward from the center of the plates? B1 = _______ T...
The temperature of the cosmic microwave background (CMB) varies with time. If the peak of the CMB was observed to be at 3.5 K, compute the wavelength at which most of the radiation would be emitted. Answer in nm.
1. [Cosmic background temperature] At present, the cosmic background radiation is at 3 K. Suppose the universe expands adiabatically (but not necessarily quasistatically). What can you say about the tem- perature of the cosmic background radiation when the total volume of the universe was one half of the present volume?
1. [Cosmic background temperature] At present, the cosmic background radiation is at 3 K. Suppose the universe expands adiabatically (but not necessarily quasistatically). What can you say about the tem-...
10 marks] Question 10 [2 2 2 2 2 The Cosmic Microwave Background (CMB) is blackbody radiation remaining from an hot phase in the universe, and currently has a temperature of 2.7K. First we will determine the current number density of CMB photons. early (a) What is the current energy density of the CMB? (b) What is the average energy of a single photon in the CMB today (at the peak of the blackbody curve)? (c) If we take this...
Please make sure you give me the correct answer
13) The cosmic background radiation permeating the universe has the spectrum of a 2.7-K blackbody radiator. The energy density of deep space is 4.19 x 10-8 J/cm3 a, What is the peak wavelength of this radiation? b, Assuming the energy density of space is from these photons, how many photons are there on average in each cubic centimeter of space?
What is the temperature If the peak of a blackbody spectrum is at 17.0 m? What is the wavelength at the peak of a blackbody spectrum if the body is at a temperature of 1700 K? About 0.1ev is required to break a "hydrogen bond" in a protein molecule. Calculate the minimum frequency and maximum wavelength of a photon that can be accomplish this minimum frequency
i need help with this problems
Problem 7 Two microwave frequencies are authorized for use in microwave ovens: 900 MHz and 2,560 MHz. a) On its highest power setting, a microwave oven can produce 1.00 kW of power onto a 30.0 by 40.0 cm area. What is the intensity in W/m2? b) Calculate the peak electric and magnetic field strength in these waves. c) The maximum safe intensity of microwaves for human exposure is 1.00 W/m. If a radar unit...
An AC antenna creates radio waves having a wavelength equal to 2.50 m. To test the signal strength, a small detector is placed immediately next to the antenna. (a) What is the frequency of the antenna's AC source? (b) If the detector is circular with radius equal to 5 cm and measures a total energy of 120 J in 10 s, what is the peak electric field of the radio waves? Prove that the image you see of yourself in...
What frequency would you need to produce a sound wave in room-temperature air with a wavelength of 4m? _______ Hz
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