Question

12. The conical projection in Fery's blackbody is.....
A) used to support the spheres
B) used to transmit incident radiation to outer sphere
c) used to prevent reflected radiation to escape outside
D) used for all of the above purposes​

Answer 1

Fery's Black Body contains a conical projection which is used to prevent the reflected radiations to escape outside.

• In physics , a perfect black body is defined as an object that can absorb all the energy from the radiations incident on it.

• Fery's Black Body is an example of a near- perfect black body.

• As we can see from the diagram , the conical projection is reflecting the incident light ray in such a manner that the the reflected ray undergoes several other reflections within the black body and doesn't escape from it.

• Due to this multiple reflection almost 99% of the incident energy can be absorbed.

$\star$ Hope It Helps.

Answer 2

used to support the spheres