40 W/m? of energy is incident on a body which has absorptivity value a=0.7, reflectivity p=0 and transmissivity -0. Find the energy emitted from the body a. 12 W/m b. 28 W/m? C.40 W/m d. 0 W/m2
Q: 2. Only one side of the wall of the room which is the one 12 meter in length are subjected to the…
A:
Q: axis is incident on a long cylinder of radius R. What fraction of energy striking the cylinder is…
A:
Q: 5. The spectral distribution of the radiation emitted by a diffuse surface is ap- proximated in the…
A: Given spectral distribution is: We have to obtain the emissive power and the total intensity
Q: 40 W/m of energy is incident on a body which has absorptivity value a-0.7, reflectivity p-0 and…
A:
Q: For a glass equilateral prism, with a base length of 50 mm. If you shine a beam of light through it…
A: As per our company guidelines we are supposed to answer only first 3 sub-parts. Kindly repost other…
Q: Calculate the maximum contact exposure rate at the side surface of a 10-foot wide railcar loaded…
A: THE “6CE” EQUATION It Is sometimes necessary to estimate the exposure rate which can be expected…
Q: 3. A transparent oil with index of refraction n = 1.29 spills on the surface of water ( n = 1.33),…
A: Given N of oil= 1.29 spills N of water=1.33 spills λ=600nm air
Q: Light of wavelength 520nm falls on a slit that is 3.20 x 10^3mm wide. Estimate how far the first…
A: When light falls on an obstacle, there will be a departure from the straight light propagation and…
Q: A solar dish has a reflector with a diameter of 100 cm and a receiver having a diamter of 10 cm. If…
A: Given Reflector diameter, Dr = 100 cm Receiver diameter, D = 10 cm
Q: The surface temperature of the sun is about 6000K. Accordingly, which wavelength corresponds to the…
A: Given: The maximum temperature, T = 6000 K
Q: A semi-transparent material is subjected to an irradiation of G= 600 W/m', 60 W/m² of which is…
A:
Q: At the surface of the sun, the temperature is approximately 5800 K. How much energy is contained in…
A: The spectral density by wavelength for a given temp of blackbody B(λ,T)=2hc2λ51ehcλKBT-1 Where…
Q: if central bright fringe due to interference for wavelength 5890A a is shifted to the position of…
A: The introduction of a transparent sheet having more refractive index than air creates optical path…
Q: Light is incident from medium 1 to medium 2 at Brewster's angle equal to 55.4°, and transmitted…
A: according to the given information we have Brewster's angle , transmitted angle and permeability of…
Q: 10- In transparent materiel the greatest part is * O absorptivity are equal O reflectivity…
A:
Q: discuss the optical properties (reflectance) of: 1.) fruit and vegetables 2.) grains
A: A material's optical property is defined as its interaction with visible electro-magnetic radiation.…
Q: 40 W/m of energy is incident on a body which has absorptivity value a=0.7, reflectivity p=0 and…
A: Explanation about what is Absorptivity , Reflectivity and Transmissivity Absorptivity : the…
Q: The peak wavelength of radiation emitted by a black body at a temperature of 2000 K is 1.45…
A: Given data: The temperature of black body is T1 = 2000 K. The peak wavelength of radiation emitted…
Q: List this type of electromagnetic radiation in order of (i) increasing wavelength and (ii)…
A:
Q: List this type of electromagnetic radiation in order of (i) increasing frequency and (ii) decreasing…
A: i) Radio<Microwave<IR<Visible<UV<X-Ray
Q: Cylindrical reactor has following dimensions 2 m radius and 3 m height. Considering that maximum…
A: Neutron leakage from any reactor can be decreased by outside (surrounding) the fueled region of the…
Q: Radiant energy with an intensity of 800 W/m2 strikes a flat plate normally. The absorptivity is…
A: Given Intensity of radiation I=800 W/m2
Q: be selected) transparent body is reflected back. If the transmissivity of the body having their…
A: 1)Given data Q1 be the heat flow of wall 1 Q2 be the heat flow of wall 2
Q: give sample problem with solution regarding interchange of radiations between two parelle vertical…
A:
Q: Consider a gray opaque surface at 0°C in an environment at 25°C. The surface has an emissivity of…
A: Given Emissivity = 0.8 Radiation intensity, E = 240 W/m2 Find Radiosity, J
Q: (a) Calculate the mass and linear absorption coefficients of air for Cr Ka radiation.Assume that air…
A: Calculate the mass absorption coefficient of air. μair=xN2μN2+xO2μO2 Here, μair is the mass…
Q: A large spherical enclosure has a small opening. The rate of emission of radiative flux through this…
A: Given, Radiative flux = q = 7.35 kW/m2 = 7350 W/m2 Stefan-Boltzmann constant = σ = 5.67 x 10-8…
Q: State and Explain Kirchhoff's Law of Radiation.
A: Given data Explain Kirchhoff's Law of Radiation.
Q: The relation between the wavelength corresponding to maximum emission and the absolute temperature…
A:
Q: At a distance of 10 meters we have a radiation intensity of 0.1 mSv/h after passing through 48 mm of…
A: 800GBq
Q: A source is producing an intensity of 200W/m at 30 cm distance from that source. a) What should be…
A:
Q: List this type of electromagnetic radiation in order of (i) increasing wavelength and (ii)…
A: Electromagnetic radiation is generally classified according to their wavelength into many different…
Q: Consider the spherical enclosure in Figure QA6. Assuming that the surfaces A₁ and A₂ are diffuse,…
A: The following expression is derived using basic definition of view factor.
Q: Which one is true for an opaque body? A Transmissivity is zero B Reflectivity is zero C Absorptivity…
A: Given: Which one is true for an opaque body?
Q: Inverse square law for heat can be investigated by measuring the thermal radiation received by the…
A: Inverse square law of heat can be investigated by measuring the thermal radiation received by the…
Q: List this type of electromagnetic radiation in order of (i) increasing frequency and (ii) decreasing…
A: (i) increasing frequency Frequency is directly proportional to the energy. Therefore, the order of…
Q: A musical note on a piano has a frequency of 31 Hz. If the tension in the 2-m string is 308 N, and…
A:
Q: As shown in the figure, the angle between two plane mirrors (M1 and M2) is 125°. If the incident ray…
A:
Q: trou n Cas 1 I, di cos² 0 dN C J sphere Prad.A di = (transmis: || les 1 2л I, dr cos² 0 sin 0 d0 dø…
A: Formula for the radiation pressure of a blackbody is derived below
Q: The expected diffraction angle for the first-order reflection from the (310) set of planes for…
A: Given, The wavelength, λ=0.0711 nm
Q: Determine the expected diffraction angle (in degrees) for the first-order reflection from the (310)…
A: Given:310 set of planes,wavelength=0.0711nmRcr = 0.1249nm
Q: Define the absorption of radiation incident on an opaque surface of absorptivity α.
A: Define the absorption of radiation incident in an opaque surface of absorptivity α
Step by step
Solved in 2 steps with 2 images
- 1.26 Repeat Problem 1.25 but assume that the surface of the storage vessel has an absorbance (equal to the emittance) of 0.1. Then determine the rate of evaporation of the liquid oxygen in kilograms per second and pounds per hour, assuming that convection can be neglected. The heat of vaporization of oxygen at –183°C is .Determine the rate of radiant heat emission in watts per square meter from a blackbody at (a) 15C, (b) 600C, and (c) 5700C.40 W/m of energy is incident on a body which has absorptivity value a=0.7, reflectivity p=0 and transmissivity -0. Find the energy emitted from the body; a. 12 W/m b. 28 W/m C 40 W/m d. 0 W/m
- At a distance of 10 meters we have a radiation intensity of 0.1 mSv/h after passing through 48 mm of a shielding material (TVL of 16 mm). If an Ir-192 source is used (SEC=0.15mSv/hr@1m per GBq), what is its activity? 5,333 GBq 666.67 GBq 800 Gbq 100 GBq 66.67 GBq 66,666 GBqPlanck's radiation law is given as: 8thv³ I = n(v)ɛ =- c3 hv ekBT – 1 8nhc 1 = n(1)ē = 25 hc eAkgT – 1 (a) Show that it reduces to the Rayleigh-Jeans law as 2 –∞. (b) Show that it reduces to Wien's law in the short wavelength limit (1 → 0). Evaluate a and b. (c) Derive the constant in the Wien's displacement law.1. Consider a spaceship that has a volume V = 3000 m³, is effectively spherical in shape and has a density comparable to water (p = 1000 kg m-3). It absorbs CMB radiation (TCMB = 2.73K) and radiates its own radiation with a blackbody spectrum of T = 300K. What is its mass, radius and surface area? At what rate does it absorb energy from the CMB? (Hint: You can use the Stefan-Boltzmann law.) How many CMB photons are absorbed per а. b. с. second? d. At what rate does it emit energy through blackbody radiation? What is the net rate that the spaceship temperature would change if the spaceship has an е. effective heat capacity of pure water: C = 4200 J kg-1K-1 ?
- A small sphere (emissivity =0.503 radius=r1) is located at the center of a spherical abestos shell ( thickness =1.74 cm, outer radius= r2; thermal conductivity of abestos is 0.090 J/ (sm c degrees) The thickness of the shell is small compared to the inner and outer radii of the shell. The temperature of the small sphere is 695 degrees Celsius while the temperature of the inner surface of the shell is 352 degrees Celsius, both temperatures remaining constant. Assuming that r2/r1 =8.75 and ignoring any air inside the shell, find the temperature in degrees Celsius of the outer surface of the shell.give sample problem with solution regarding interchange of radiations between two parelle vertical planes (heat transfer)A small sphere (emissivity = 0.745, radius = r1) is located at the center of a spherical asbestos shell (thickness = 1.72 cm, outer radius = r2; thermal conductivity of asbestos is 0.090 J/(s m Co)). The thickness of the shell is small compared to the inner and outer radii of the shell. The temperature of the small sphere is 727 °C, while the temperature of the inner surface of the shell is 406 °C, both temperatures remaining constant. Assuming that r2/r1 = 6.54 and ignoring any air inside the shell, find the temperature in degrees Celsius of the outer surface of the shell.
- Give step-by-step calculation and explanation Consider a person sitting nude on a beach in Florida. On a sunny day, visible radiation energy from the sun is absorbed by the person at a rate of 30 kcal/h or 34.9 W. The air temperature is a warm 30 °C and the individual’s skin temperature is 32 °C. The effective body surface exposed to the sun is 0.9 m². (Assume this same area for sun absorption, radiative transfer, and convective loss. Is this a good assumption?) a. Find the net energy gain or loss from thermal radiation each hour. (Assume thermal radiative gain and loss according to the equation 6.51 in Herman and an emissivity of 1.) -(4). Equalion (6.51) - (40Tin)Eskin Aşkin (Tskin – Troom) dt = (4 x 5.67 x 10¬8 w/m²–K* x (307 K)')€skin Askin (Tskin – Troom). (6.52) b. If there is a 4 m/s breeze, find the energy lost by convection each hour. (Use Eq. 6.61 with eq. 6.63.) 1 Equation he(Tskin – Tair), (6.61) A dt he 10.45 – w + 10w0.5 (6.63) - c. If the individual’s metabolic rate is…The exposure rate to the fingers of a technologist holding a generator elution vial is 5.3 R/hr (assume an average distance of 2.0 cm from the fingers to the vial). What is the exposure rate to the fingers if the vial is held in 22-cm tongs? If the vial is held in the tongs for 3 minutes, what is the total radiation exposure to the technologist's hand in Roentgens?€ = 0.7 R = 50 cm T = 500°C Consider a furnace with a spherical cavity (R = 50 cm). If the walls of the cavity have an emissivity of 0.7 and a temperature of 500 ˚C, calculate the total emmisive power, E, inside the cavity.