(D) For any surface,the sum of absorptance $(a)$,reflectance $(r)$,and transmittance $(t)$ is equal to $1$,i.e.,$a + r + t = 1$.Given,$a = 0.4$ and $r

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

The body will be perfectly opaque.

(D) For any surface,the sum of absorptance $(a)$,reflectance $(r)$,and transmittance $(t)$ is equal to $1$,i.e.,$a + r + t = 1$.Given,$a = 0.4$ and $r = 0.6$.Substituting these values into the equation: $0.4 + 0.6 + t = 1$.$1.0 + t = 1$.Therefore,$t = 0$.Since the transmittance $(t)$ is $0$,no radiation can pass through the body.Thus,the body is perfectly opaque.

Class 11 Physics 2 Thermal Properties of Matter: Heat Transfer Radiation (General, Kirchoff's law, Black body, Prevost's Theory)

Easy

If the absorptance and reflectance of a surface are $0.4$ and $0.6$ respectively,then:

A
The emissive power will be $0.2$.
B
The transmittance will be $0.2$.
C
The body will be perfectly transparent.
D
The body will be perfectly opaque.

Explore More

Browse All

Question Bank

All Subjects

Class 11 Questions

Class 11

Physics Questions

Chapter

2 Thermal Properties of Matter: Heat Transfer

Subtopic

Radiation (General, Kirchoff's law, Black body, Prevost's Theory)

''$A$ perfect black body is black in colour.'' Is this statement true or false?

Easy

View Solution

We consider the radiation emitted by the human body,which of the following statements is true?

EasyMHT CET 2011

View Solution

The rate of radiation of energy from a hot object is maximum,if its surface is ...........

Easy

View Solution

$x$ joule of heat is incident on a body. Out of it, the total heat reflected and transmitted by it is $y$ joule. The absorption coefficient of the body is

MediumMHT CET 2026

View Solution

Good absorbers of heat are

Easy

View Solution

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial

For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free

For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo

If the absorptance and reflectance of a surface are $0.4$ and $0.6$ respectively,then:

Similar Questions

''$A$ perfect black body is black in colour.'' Is this statement true or false?

We consider the radiation emitted by the human body,which of the following statements is true?

The rate of radiation of energy from a hot object is maximum,if its surface is ...........

$x$ joule of heat is incident on a body. Out of it, the total heat reflected and transmitted by it is $y$ joule. The absorption coefficient of the body is

Good absorbers of heat are

Vedclass Test Series

Exam Paper Generator

Online Exam Module