Variations in the amount of light reflected from the disc are sensed by a photodetector.
There are also slight variations in the amount of energy radiated by the sun.
Systematic variations in the amount of PEG incorporations were carried out to get water soluble oligomers.
This 11-year cycle of sunspot activity produces variations in the amount of ultraviolet radiation emitted by the Sun.
These differences include local variations in the amount of Ni2+ in the coatings, as well as the local coverage.
A great variety of vegetation is found in Texas because of variations in the amount of precipitation and types of soils.
On the broader implications of the work: Our studies show that there are great natural variations in the amount of Arctic sea ice.
Scientists said the observations by the Mars Global Surveyor spacecraft provided evidence of substantial annual variations in the amount of carbon dioxide frozen in the polar caps and thus the amount that evaporates to increase atmospheric pressure.
Researchers at Dartmouth Medical School have found large variations in the amount of hospital care and other services that people with the same condition receive in different parts of the country.
The bulk of interviewees said the most important aspect of schooling was to learn English so they could become independent, but there were wide variations in the amount of English language tuition and support they received.
We interpret these results as indicative of variations in the amount of precipitation of westerly origin, with prominent increases at 6800, 5100, and 2400 cal yr BP.
