Absorption and Emission :: Discussion


9. A black body at 200 K is found to emit maximum energy at a wavelength 14μm. When its temperature is raised to 1000K, then wavelength at which maximum energy emitted it?
A.14mm
B.7μm
C.2.8μm
D.28mm
Answer:  Option  C
Explanation:

By Wien’s law,
200×14=100×T
T=2.8μm.

Tutorial Link:
Published by:Michael Daani

Comments are not available

Post your comments here:

Optional

Date to Date Current Affairs 2022

PakMCQs.net

Quick Links

GAT Subject



   Computer Science    English Mcqs    Agriculture    

Engineering



   Computer Science    Civil Engineering    

Technical



   Networking    Electronics    Database    

Past Papers



   Model Papers    FPSC Papers