MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Average and Instaneous Power

At a given te...

Question

At a given temperature, the ratio between emissive power and absorptive power is same for all bodies and is equal to the emissive power of black body. This statement is called

A

Newtons Law

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

Plancks law

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

Kirchoffs law

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

D

Weins law

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B Kirchoffs law
According to Kirchoff's law : At a given temperature, the ratio between emissive power and absorptive power is same for all bodies and is equal to the emissive power of black body.
This directly implies that good emitters are also good absorbers.

Suggest Corrections

thumbs-up

0

Similar questions

Q. Statement 1 : Emissivity of any body

(e)

is equal to its absorptivity

(a)

at thermal equilibrium.
Statement 2 : The ratio of emissive power to the absorptive power is different for different bodies at a given temperature.

Q. What is the relation between emissive power of a real body

(E)

and emissive power of black body

(E_{b})

when both are at same temperature? ;

α = absorptivity

Q. At a particular temperature and wavelength, the spectral emissive power and monochromatic absorptive power of a body are

10

8

units respectively. The emissive power of a black body at the same temperature will be :

Q. At a certain temperature for given wave length , the ratio of emissive power of a body to emissive power of black body in same circumstances is known as

Q. Between two wavelengths

500 A^{\circ}

1000 A^{\circ}, a_{λ}

is the absorptive power and

e_{λ}

is the emissive power of a body. If

E_{λ}

is the emissive power of a perfectly black body then according to Kirchhoff's law,

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Power

PHYSICS

Watch in App

explore_more_icon

Explore more

Average and Instaneous Power

Standard XII Physics

Join BYJU'S Learning Program

CrossIcon