QUESTION 10a) A furnace that has a glass window of 50 cm X 50 cm can be considered as a blackbody at 1200 K.If the transmissivity of the glass is 0.7 for radiation at wavelength less than 3 µm and zero forradiation at wavelength greater than 3 µum, determine the fraction and the rate of radiation comingfrom the furnace and transmitted through the window.b) The reflectivity of aluminum coated with lead sulfate is 0.35 for radiation at wavelength less than3 um and 0.95 for radiation at wavelength greater than 3 µm,i. determine the average reflectivity of this surface for solar radiation (T=5800 K) and theradiation coming from the surface at room temperature (T=300 K)ii. Kindly evaluate based on the emissivity and the absorptivity of this surface at both temperature,if the material is suitable for use in solar collectors.

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A furnace that has a glass window of 50 cm X 50 cm can be considered as a blackbody at 1200 K. If the transmissivity of the glass is 0.7 for radiation at wavelength less than 3 µm and zero for radiation at wavelength greater than 3 pum, determine the fraction and the rate of radiation coming from the furnace and transmitted through the window.

A furnace that has a glass window of 50 cm X 50 cm can be considered as a blackbody at 1200 K. If the transmissivity of the glass is 0.7 for radiation at wavelength less than 3 µm and zero for radiation at wavelength greater than 3 pum, determine the fraction and the rate of radiation coming from the furnace and transmitted through the window.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Radiation

Radiation can be described as the energy in the form of a particular matter or electromagnetic waves traveling in the air and can be in the form of light, sound, and heat. Radiation can be detected through special instruments like X-rays. The radiation from a cooler object is less intense as compared to the radiation from hot objects.

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