Black Body Radiation


by Manula
Tags: black, body, radiation
Manula
Manula is offline
#1
Jul1-11, 02:26 AM
P: 29
Consider a hollow cuboid with a small hole on one of it's sides(interior surface is mat black).and let this cuboid be in a vacuum.if we allow a light ray to pass trough this small small hole.

from which surface would the re radiation occur?

Does this happen?
the amount of radiations hitting the interior surface per unit time is re radiated per unit time from the surface.since all the re radiated waves cannot exit trough the hole the temperature inside the cuboid increases until the the amount of radiations leaving trough the hole is equal to the amount of radiations entering trough the hole.

[and also due to the temperature difference between the external surface and the surrounding can the object simply radiate according to newton's law of cooling.]
Phys.Org News Partner Physics news on Phys.org
Sensitive detection method may help impede illicit nuclear trafficking
CERN: World-record current in a superconductor
Beam on target: CEBAF accelerator achieves 12 GeV commissioning milestone
Drakkith
Drakkith is offline
#2
Jul2-11, 03:54 AM
PF Gold
Drakkith's Avatar
P: 10,999
That looks good to me. Looks to me like the initial radiation inside the cube would be from the wall opposite the hole.


Register to reply

Related Discussions
Black Body Radiation. General Physics 1
Black Body Radiation Quantum Physics 7
Black Body Radiation Introductory Physics Homework 6
Black body radiation Quantum Physics 5
Black body Radiation Introductory Physics Homework 2