You use an IR-thermometer that uses an assumed emissivity value of 0.95. What temperature will it show if a rooms ambient temperature is 20°C and you measure a surface temperature of 80°C and the true emissivity value is: a) 0.98 b) 0.92 c) 0.15

You use an IR-thermometer that uses an assumed emissivity value of 0.95. What temperature will it show if a rooms ambient temperature is 20°C and you measure a surface temperature of 80°C and the true emissivity value is: a) 0.98 b) 0.92 c) 0.15

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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Question

You use an IR-thermometer that uses an
assumed emissivity value of 0.95. What
temperature will it show if a rooms ambient
temperature is 20°C and you measure a
surface temperature of 80°C and the true
emissivity value is:
a) 0.98
b) 0.92
c) 0.15

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