Black Body Radiation: A 100W incandescent bulb has a tungsten filament at 2000C. If you model...
Black Body Radiation:
A 100W incandescent bulb has a tungsten filament at 2000C. If you model the bulb as a blackbody where the average photon energy is given by the peak wavelength of the blackbody spectrum, how many photons N is the bulb radiating per second?
Homework Answers
Here ,
temperature of bulb , T = 2000 degree C
T = 2273 K
now , wavelength is
wavelength = 2.898 *10^-3/T
wavelength = 2.898 *10^-3/2273
wavelength = 1.275 *10^-6 m
energy of 1 photon , E = h*c/wavelength
E = 6.626 *10^-34 * 3 *10^8/( 1.275 *10^-6)
E = 1.559 *10^-19 J
total number of photon = 100/( 1.559 *10^-19)
total number of photon = 6.414 *10^20
the total number of photon is 6.414 *10^20
Add Answer to:
Black Body Radiation:
A 100W incandescent bulb has a tungsten filament at 2000C. If
you model...
30.The tungsten filament in a typical incandescent light bulb operates at approximately 2800 K. What is...
30.The tungsten filament in a typical incandescent light bulb operates at approximately 2800 K. What is the wavelength at the peak of the emitted radiation? (a) 142.8 nm, (b) 474 nm, (c) 561 nm, (d) 1035 nm.
Problem 8.3. The temperature of the tungsten filament in a 100 W light bulb is at 3000 C. Assume ...
Problem 8.3. The temperature of the tungsten filament in a 100 W light bulb is at 3000 C. Assume it emits as a black body and calculate: 09 (a) the area of the wire. wavelength of the max (c) the fraction emitted in: UV range Visible range 35 m25m Fig. 1 - IR range d) The fraction of energy that is transmitted through the glass window (see Fig.). e) The % of useful visible light produced by the light bulb....
1. The filament of a standard 100-W light bulb has a resistance of about 100 ohms....
1. The filament of a standard 100-W light bulb has a resistance of about 100 ohms. For this laboratory the glass of the light bulb is unfrosted, so that the filament can be viewed directly. The light bulb is connected to a variable AC voltage source (a Variac), which can deliver up to 140 volts AC. When the voltage is low, about 20 volts, the filament is a dull, red color. When the voltage is high, 100 V, how does...
2. The average person has 1.4 m2 of skin at a skin temperature of roughly 305...
2. The average person has 1.4 m2 of skin at a skin temperature of roughly 305 K (90°F) Consider the average person to be an ideal radiator standing in a room at a temperature of 293 K (68°F) (a) Calculate the power (energy per uni i) radiated by the average person in the form of blackbody radiation; express your answer in erg s-1. What is the person's "wattage"? (1 W = 107 erg s-1) Compare this to a typical incandescent...
A black body has an effective surface temperature of 450°C. Determine: (a) The total radiation energy...
A black body has an effective surface temperature of 450°C. Determine: (a) The total radiation energy (W/m2) that can be emitted by the black body (b) Determine total radiation energy (W/m%) that can be emitted by the black body within the 5-50 um wavelength region (c) The spectral blackbody emissive power of the black body at a wavelength of 10 um. 12
8. A black body has an effective surface temperature of 450°C. Determine: (a) The total radiation...
8. A black body has an effective surface temperature of 450°C. Determine: (a) The total radiation energy (W/m²) that can be emitted by the black body (b) Determine total radiation energy (W/m²) that can be emitted by the black body within the 5-50 um wavelength region (c) The spectral blackbody emissive power of the black body at a wavelength of 10 um.
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?
17. Entropy and occupancy. We argued in this chapter that the entropy of the cosmic black body radiation has not changed with time because the number of photons in each mode has not changed with time...
17. Entropy and occupancy. We argued in this chapter that the entropy of the cosmic black body radiation has not changed with time because the number of photons in each mode has not changed with time, although the frequency of each mode has decreased as the wavelength has increased with the expansion of the universe. Establish the implied connection between entropy and oc- cupancy of the modes, by showing that for one mode of frequency the entropy is a function...
An oven (considered to be a black body) is at 6000K. a) What is the EM intensity of the oven betw...
An oven (considered to be a black body) is at 6000K. a) What is the EM intensity of the oven between the wavelengths of 550nm and 551nm? (Hint: us the average wavelength for .) b) Find the number of photons of this radiation escaping per second through a tiny hole in the oven of radius 0.025mm. (Hint: first find the # of J/sec escaping.)
Part A A 100-watt light bulb radiates energy at a rate of 100 J/s. (The watt,...
Part A A 100-watt light bulb radiates energy at a rate of 100 J/s. (The watt, a unit of power or energy over time, is defined as 1 J/s.) If all of the light emitted has a wavelength of 525 nm, how many photons are emitted per second? Express your answer to three significant figures. X 10 radiation- photons per second Submit Previous Answers Request Answer X Incorrect: Try Again; 12 attempts remaining Part B The energy required to dislodge...
Problem 8.3. The temperature of the tungsten filament in a 100 W light bulb is at 3000 C. Assume it emits as a black body and calculate: 09 (a) the area of the wire. wavelength of the max (c) the fraction emitted in: UV range Visible range 35 m25m Fig. 1 - IR range d) The fraction of energy that is transmitted through the glass window (see Fig.). e) The % of useful visible light produced by the light bulb....
1. The filament of a standard 100-W light bulb has a resistance of about 100 ohms. For this laboratory the glass of the light bulb is unfrosted, so that the filament can be viewed directly. The light bulb is connected to a variable AC voltage source (a Variac), which can deliver up to 140 volts AC. When the voltage is low, about 20 volts, the filament is a dull, red color. When the voltage is high, 100 V, how does...
2. The average person has 1.4 m2 of skin at a skin temperature of roughly 305 K (90°F) Consider the average person to be an ideal radiator standing in a room at a temperature of 293 K (68°F) (a) Calculate the power (energy per uni i) radiated by the average person in the form of blackbody radiation; express your answer in erg s-1. What is the person's "wattage"? (1 W = 107 erg s-1) Compare this to a typical incandescent...
A black body has an effective surface temperature of 450°C. Determine: (a) The total radiation energy (W/m2) that can be emitted by the black body (b) Determine total radiation energy (W/m%) that can be emitted by the black body within the 5-50 um wavelength region (c) The spectral blackbody emissive power of the black body at a wavelength of 10 um. 12
8. A black body has an effective surface temperature of 450°C. Determine: (a) The total radiation energy (W/m²) that can be emitted by the black body (b) Determine total radiation energy (W/m²) that can be emitted by the black body within the 5-50 um wavelength region (c) The spectral blackbody emissive power of the black body at a wavelength of 10 um.
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?
17. Entropy and occupancy. We argued in this chapter that the entropy of the cosmic black body radiation has not changed with time because the number of photons in each mode has not changed with time, although the frequency of each mode has decreased as the wavelength has increased with the expansion of the universe. Establish the implied connection between entropy and oc- cupancy of the modes, by showing that for one mode of frequency the entropy is a function...
Part A A 100-watt light bulb radiates energy at a rate of 100 J/s. (The watt, a unit of power or energy over time, is defined as 1 J/s.) If all of the light emitted has a wavelength of 525 nm, how many photons are emitted per second? Express your answer to three significant figures. X 10 radiation- photons per second Submit Previous Answers Request Answer X Incorrect: Try Again; 12 attempts remaining Part B The energy required to dislodge...
Most questions answered within 3 hours.
-
Define Diet counceling? What are the
responsibilities of a counselor?
asked 1 hour ago -
Hey im just confused about how to put the ' A angle n' and ' S...
asked 1 hour ago -
A short essay about the WSJ article on Oreo versus Hydrox.
asked 1 hour ago -
##8. A program contains the following function definition:
##def cube(num):
##return num * num * num...
asked 1 hour ago -
find the value z of a standard Normal variable that satisfies
each of the given conditions....
asked 1 hour ago -
"banana".find('z')
Out[22]: -1
why is this -1
python 3.7
asked 1 hour ago -
Ilegal Consideration Marna Balin was involved in two automobile
accidents in which she suffered severe injures.She...
asked 1 hour ago -
Walk through the operation of QuickSort when n = 7 and the input
array is A...
asked 1 hour ago -
Answer with True or False. Argue the answers
7) The circulation of field B on any...
asked 1 hour ago -
Chase Co. uses the perpetual inventory method. The inventory
records for Chase reflected the following
Jan...
asked 1 hour ago -
what are is the correct compression for these two ipv6 ips.. i
keep getting them wrong...
asked 1 hour ago -
How does the amount of silica gel used change separation?
asked 1 hour ago