(a) Calculate the rate in watts at which heat transfer through radiation occurs (almost entirely in the infrared) from 1.0m2 of the Earth’s surface at night. Assume the emissivity is 0.90, the temperature of the Earth is 15ºC, and that of outer space is 2.7 K. (b) Compare the intensity of this radiation with that coming to the Earth from the Sun during the day, which averages about 800W/m2, only half of which is absorbed. (c) What is the maximum magnetic field strength in the outgoing radiation, assuming it is a continuous wave?

Q: Two parallel disks of diameter D = 3 ft separatedby L = 2 ft are located directly on top of each…

A: Given,

Q: Consider the electromagnetic radiation inside a kiln, with a volume of 1 m3 and a temperature of…

A: Volume, V=1 m3 Temperature, T=1500 K Total energy of this radiation,  U=8π5kT415hc3V where, k is…

Q: If the energy received by 5 m² area in 560 seconds is 2880 KJ. Calculate the value of Solar constant…

A: Introduction :   In this question we are provided with value of area , time and energy. With these…

Q: Radiation Energy The total radiation energy E emittedby a heated surface per unit area varies as the…

A: Given: The temperature on the surface of the sun = 6000 K The temperature on the surface of earth =…

Q: If emissivity of the body is equal to 1 and Stefan constant= 5.7x10-8 watt/m?. k°. when a person is…

A:

Q: About 5% of the power of a 100 W light bulb is converted to visible radiation. What is the average…

A: Power output of light = 0.05*100 = 5 Watt

Q: At what wavelength is the radiation emitted by the human body at its maximum? Assume a temperature…

A:

Q: If the energy received by 2 m² area in 350 seconds is 4480 KJ. Find the value of Solar constant ?

A: Given data ,   Energy  =  E   Time  =   t    Area  =  A      To find ,     Solar constant

Q: The condition under which a microwave oven heats up a food item containing water molecules most…

A: In the presence of microwave, the  water molecules will oscillates and large heat is developed.

Q: If the energy received by 6 m? area in 11 minutes is 4400KJ. Calculate the value of Solar constant ?

A: Given data :       Energy  =  E          Time  =  t            Area  =  A         To find :…

Q: The mean distance between the Earth and the Sun is 1.50×1011 m. The average intensity of solar…

A:

Q: A B-emitting radiation source gives 250 units of radiation at a distance of 4.0 m. At what distance…

A: We know thatPower per unit area is called intensity.I=PAArea  is given by…

Q: If the energy received by 7 minutes is 4690KJ. 5 m² area in Calculate the value of Solar constant ?

A:

Q: The human body has a surface area of approximately 1.8 m2, a surface temperature of approximately…

A: Given: The area A = 1.8 m2. The temperature T = 30 0C =303 K. Emissivity e = 0.97.

Q: Assuming to be a black body emitting radiation with maximum intensity at 0.5 µ. Calculate the…

A: According to Wien’s displacement law, the peak wavelength of a blackbody emitter is given by;…

Q: The temperature of a student’s skin is 33.0°C. At what wavelength does the radiation emitted from…

A: Convert the given temperature in degree Celsius to kelvin.

Q: On a sunny day some concrete paving stones receive 140O W of solar electromagnetic power per square…

A:

Q: For the location 32 N in November 2 if transmission coefficient t is 0.6 and the diffuse radiation…

A: Let Id be defined as the direct beam solar radiation. Therefore, Id=CIbN=CAexp-Bcosθz Here, IbN is…

Q: What is the difference between the rates of radiation emitted by the surface and the radiation.

A: Rate of radiation and radiation

Q: Why is the radiation analysis of enclosures that consist of black surfaces relatively easy? How is…

A: Black body or black surfaces are perfect emitter and reflector of radiations and their reflectivity…

Q: A radiometer has two square vanes (2.0 cm by 2.0 cm), attached to a light horizontal cross arm, and…

A: Given information: Here, I is the light’s intensity.

Q: If the energy received by 5 m? area in 10 minutes is 3890KJ. Calculate the value of Solar constant ?

A:

Q: what is the power radiated per (cm²) from skin at temperature of 306k? what is the power radiated…

A: The exterior parts of the body temperature is have a  little bit variation in different parts.…

Q: Betelgeuse, a red-giant star in the constellation Orion, has a peak in its radiation at a frequency…

A:

Q: To maximize the radiation pressure on the sails of a spacecraft using solar sailing, should the…

A: The first spacecraft to use solar sailing was launched in 2010 by Japan Aerospace Exploration…

Q: If the energy received by 5 m² area in 430 seconds is 5120KJ. Find the value of Solar constant ?

A: Introduction :  In this question we are provided with value of area , time and energy . With these…

Q: hat is the frequency od the most intense radiation from an object with temperature 100 C? Answer :…

A: We know that  Temp = 100°C According to wiens equation   λ = b / T b=2.8977 x 10-3 m / K  T = 100 +…

Q: A spherical surface of area 0.6m2, emissivity 0.86 and temperature 112°C is placed in a large,…

A: (a) Area, A = 0.6 m2 emissivity, e = 0.86 T = 112°C = 385 K  Stefan's constant σ = 5.67 x 10-8…

Q: _____ is the transfer of heat via ____ waves.  a) conduction, mechanical  b) radiation,…

A: d) Radiation  is the transfer of heat via electromagnetic waves.

Q: Find the intensity of the total radiation falling on an object in which the diffuse radiation is…

A:

Q: If the energy received by 5 m? area in 11 minutes is 3400KJ. Calculate the value of Solar constant ?

A: Given data :       Time  =  t       Area  =   A       Energy  =  E      To find :       Solar…

Q: A garage is illuminated by a single incandescent lightbulb dangling from a wire. If the bulb…

A: Given data The power is, P=50.0 W The distance is r = 1.00 m The power consumed is, n=5.00% Step 1…

Q: If the energy received by 7 m? area in 6 minutes is 4290KJ. Calculate the value of Solar constant ?

A: Energy recieved (E) = 4290 kJ Area (A) = 7 m2Time (t) = 6 minutes

Q: If the energy received by 8 m² area in 14 minutes is 4600 KJ. calculate the value,of Solar constant…

A: Given data :        Time  =  t        Area  =  A      Energy  =  E        To find :            Solar…

Q: White dwarf stars have been observed with a surface temperature as hot as 200,000°C. What is the…

A: Given data *The surface temperature of the dwarf star is T = 200,000°C = (200000 + 273) K = 200273 K…

Q: Two very large parallel plates are maintained at uniform temperatures T1 =800 K and T2 = 500 K and…

A:

Q: A tungsten fi lament of a typical incandescent lightbulboperates at a temperature near 3000 K. At…

A: