Sentences with phrase «amount of background radiation»

It's possible that the reduced amount of background radiation in the solar neighborhood could have been a factor in the emergence of humans, he adds.

Robert Finkelman, a former USGS coordinator of coal quality who oversaw research on uranium in fly ash in the 1990s, says that for the average person the by - product accounts for a miniscule amount of background radiation, probably less than 0.1 percent of total background radiation exposure.

Not exact matches

Experts say the dose from the backscatter is negligible when compared with naturally occurring background radiation, but a linear model shows even such trivial amounts increase the number of cancer cases

The next decade, studies of the cosmic microwave background (the relic radiation from the Big Bang) by the Wilkinson Microwave Anisotropy Probe, or WMAP, provided a new way to measure the total amount of dark matter; this is the same technique that the Planck spacecraft built upon to come up with its more precise cosmic breakdown.

But calculations of the amount of ionized hydrogen in intergalactic space depend on the ionization rate for the background radiation, and a lower ionization rate would mean less ionized hydrogen.

The residual amount of anisotropy in the Universe allowed by his calculations is, he claims, just enough to explain the temperature irregularities in the cosmic background microwave radiation found by NASA's Cosmic Background Explorer (COBE) background microwave radiation found by NASA's Cosmic Background Explorer (COBE) Background Explorer (COBE) satellite.

The amount of radiation leaked was nil — that is in the range of millirems, way down the natural radiation background levels.