31.   The plastic sheets are coated with a transparent conductive material, and the emulsion is made up of microscopic polyiodide crystals, which absorb light strongly.

32.   The retinas of the eyes, for example, work by absorbing light, and that necessarily makes them appear dark.

33.   The scientists said the dusty air scatters and absorbs light.

34.   The test was possible, he said, because all gases, including water vapor and helium, absorb light at specific and unique wave lengths.

35.   These electrical contacts also absorb light.

36.   Every tissue absorbs light of a certain colour or wavelength.

37.   Normally, the gas atoms would absorb any light directed into the trap.

38.   Organic compound absorb infrared light in unique ways.

39.   Swept free of snow by the wind, such ice is so dense that it absorbs light.

40.   This light is absorbed by the halos of gas surrounding the galaxies, producing shadows that reveal the presence of the galaxies.