The spectral reflectivity distribution for white paint (Figure 12.22) can be approximated by the following stair-step function:

Question:

The spectral reflectivity distribution for white paint (Figure 12.22) can be approximated by the following stair-step function:


A small flat plate coated with this paint is suspended inside a large enclosure, and its temperature is maintained at 400 K. The surface of the enclosure is maintained at 3000 K and the spectral distribution of its emissivity has the following characteristics:


  (a) Determine the total emissivity, ɛ, of the enclosure surface.

  (b) Determine the total emissivity, ɛ, and absorptivity, α, of the plate.

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For  book-img-for-question

Fundamentals of Heat and Mass Transfer

ISBN: 978-0471457282

6th Edition

Authors: Incropera, Dewitt, Bergman, Lavine

Question Posted: