A small hole in the wall of a cavity in an object of any kind behaves like a blackbody because any radiation that falls on it is trapped inside by reflections from the cavity wall unit it is absorbed. At what rate does radiation escape from a hole of area 30cm2 in the wall surface whose interior temperature is 600°C?

A small hole in the wall of a cavity in an object of any kind behaves like a blackbody because any radiation that falls on it is trapped inside by reflections from the cavity wall unit it is absorbed. At what rate does radiation escape from a hole of area 30cm2 in the wall surface whose interior temperature is 600°C?

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

See similar textbooks

Similar questions

A copper cylinder with a temperature of 307 K is found to emit 124 J of energy each second. If the cylinder radiates like a blackbody, what is its surface area?
(a) Calculate the rate in watts at which heat transfer through radiation occurs (almost entirely in the infrared) from 1.0 m2 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 800 W/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?
If a black body is heated 27°C to 927°C. Then the ratio of radiation emitted will be (a) 1:4 (b) 1:16 (c) 1:8 (d) 1:256
The incident radiation on the earth's surface can be approximated by Ii = In cos 0, where In = 80 W/m2. sr is the total radiation intensity directed perpendicular to the surface. What is the total irradiation at the surface of the earth?
A dielectric material has an absorption coefficient of 0.25 cm−1. A plate of thickness 3 cm is made from this material, and light with intensity 20 W m−2 is incident on the front. Ignoring reflection losses, calculate the intensity transmitted through the plate.Give your answer as a decimal to 2 d.p.
Assume that your body (with temperature of 310 K) can be approximated as a blackbody. What is the typical wavelength of the radiation from your body? Is this radiation visible, infrared, X-ray, or radio?
A black body at 1227°C emits radiations with maximum intensity at a wavelength of 5000 Å. If the temperature of the body is increased by 1000°C, the maximum intensity will be observed at
The intensity of light from the Sun reaching the surface of the Earth is 1.36 kWm^−2. Assume thatthe radius of the Sun is 6.96×10^8m and the Earth to Sun distance is 1.5×10^11m. Calculate: (a) The temperature at its surface and the wavelength of its strongest radiation. (b) The total power radiated by the Sun.
Two very large parallel plates are maintained at uniform temperatures of T1 = 600 K and T2 = 400 K and have emissivities «1 = 0.5 and «2 = 0.9, respectively. Determine the net rate of radiation heat transfer between the two surfaces per unit area of the plates.
The electromagnetic energy emitted by a perfect radiator corresponding to a temperature T and surface area A is? a) AσT4Δt, in unit time Δt b) AeσT4Δt, in unit time Δt c) Ae4 c) AeσT4 d) AσT4
A rectangular metal plate measures 0.24 m long and 0.7 m wide. The plate is heated to a temperature of 1,533 K by passing a current through it. Assuming that it behaves like a blackbody, how much power does the plate radiate under these conditions?
Two very large parallel plates are maintained at uniform temperatures T1 =800 K and T2 = 500 K and have emissivities «1 = 0.2 and «2 = 0.7,respectively. Determine the net rate of radiationheat transfer between the two surfaces per unit surface area of the plates.