Easy
The relation between emissivity $e$ and absorptive power $a$ for a black body is:
- A$e = a$
- B$e = \frac{1}{a}$
- C$e = a^2$
- D$a = e^2$
Explore More
Similar Questions
$A$ body has a black spot on it. When the body is heated and taken into a dark room,the black spot glows more brightly. This can be explained by which of the following?
Medium
View SolutionWhich of the following is best close to an ideal black body?
If the absorptance and reflectance of a surface are $0.4$ and $0.6$ respectively,then:
Easy
View SolutionTwo thermometers $A$ and $B$ are exposed to sunlight. The bulb of $A$ is painted black,but that of $B$ is not painted. Which of the following statements is correct regarding this case?
Easy
View Solution$A$ thermopile bolometer is used to detect:
Vedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo