Sentences with phrase «result of blackbody»

The Draper point, named after 19th century scientist John William Draper, is the approximate temperature (977 degrees Fahrenheit, 525 degrees Celsius) above which nearly all solid materials will begin to emit visible light (e.g. glow «red hot») as a result of blackbody radiation.

Not exact matches

Our results suggest that the size of the smooth cloud, a dominant component in the model, is by about 10 % more compact than previously thought, and that the dust sizes are not large enough to emit blackbody radiation in the mid-IR.

Just to follow - up on John Finn's question (# 10), if one puts in a rough value for the emissivity of the earth (whatever that might be), so one is no longer assuming it is a perfect blackbody, then does the resulting estimate for climate sensitivity correspond to what one would expect in the absence of any feedback effects?

Since the 155 W / m2 GHE is the GHE forcing based on the present climate (in the sense that removing all GH agents (only their LW opacity, keeping solar radiation properties constant) results in a forcing of -155 W / m2 at TOA for the present climate, and we know that without any GHE, in the isothermal blackbody surface approximation, the temperature will fall approximately 33 K without any non-Planck feedbacks), it can be compared to smaller climate forcings made in the context of the present climate (such as a doubling CO2.)

So you think that black sphere inside a series of glass spheres (with vacuum between them) would result in a temperature several times higher than an ideal blackbody in the same conditions?

He defines the Planck distribution for blackbodies in terms of a derivation form Bose - Einstein — it isn't — and then makes an intuitive leap to explain the «notch» as a function of gaps in the emitted frequency spectrum as a result of Bose - Einstein juggling.

Their first graph shows the difference of 1997 — 1970 spectral results converted from W / m2 into Brightness Temperature (the equivalent blackbody radiation temperature).

Note 1: If having an emissivity of 1 because this means a «blackbody» is concerning to anyone, just pick an emissivity of your own choice and multiply the results by the emissivity — the final point will be exactly the same.

Now, some assumptions can be made in physics, like the five postulates of quantum mechanics that give real world results, but a blackbody is probably not a good one.

The Earth is not a blackbody and the absorptivity measured with appropiate technology gave a result of 0.82.