Chapter: Kinetic Theory of Gases and Radiation· Physics

If coefficient of emission is ‘e’ for a perfectly black body and coefficient of transmission is ‘t’ then ____.

Q.1 (iii) If coefficient of emission is ‘e’ for a perfectly black body and coefficient of transmission is ‘t’ then ____.

A. e = 0, t = 1

B. e = 1, t = 1

C. e = 0, t = 0

D. e = 1, t = 0

Doubtly Asked 29 Oct 2026 Board exam · July 2024 hsc 12th Save WhatsApp Report

1 answer

Best answer

Answer: D. e = 1, t = 0

Answer: (d) e = 1, t = 0

A perfectly black body absorbs all radiation falling on it: \(a = 1\), \(r = 0\), \(t = 0\). By Kirchhoff’s law a good absorber is a good emitter, so its coefficient of emission \(e = a = 1\).

Doubtly AI · 29 Oct 2026 AI-generated · not yet verified Report

Was this answer helpful?

If coefficient of emission is ‘e’ for a perfectly black body and coefficient of transmission is ‘t’ then ____.

1 answer

Your answer