Consider a 20-cm x 20-cm x 20-cm cubical body at 750 K suspended in the air. Assuming the body closely approximates a blackbody. Determine: i. the rate at which the cubes emits radiation energy in W, and ii. the spectral black-body emissive power at a wavelength of 4-micron meter?

Consider a 20-cm x 20-cm x 20-cm cubical body at 750 K suspended in the air. Assuming the body closely approximates a blackbody. Determine: i. the rate at which the cubes emits radiation energy in W, and ii. the spectral black-body emissive power at a wavelength of 4-micron meter?

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter11: Heat Transfer By Radiation

Section: Chapter Questions

Problem 11.6P

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Concept explainers

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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Consider a 20-cm x 20-cm x 20-cm cubical body at 750 K suspended in the air.
Assuming the body closely approximates a blackbody. Determine:
i.
the rate at which the cubes emits radiation energy in W, and
ii.
the spectral black-body emissive power at a wavelength of 4-micron meter?

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