21.   Meanwhile snow-covered ground continues to suffer a net loss of infrared radiation.

22.   No two substances absorb infrared radiation exactly the same way, he said.

23.   Photographs can be made by sound, heat, infrared radiation, electron beams, X-rays.

24.   Radiation refers to the process by which the earth cools through the net loss of infrared radiation.

25.   Similarly, thermometers are located five feet above the ground and away from buildings so that infrared radiation from these objects is not readily absorbed by instruments.

26.   Snow surrounding trunks, despite reflecting visible light, readily absorbs this infrared radiation, becoming warmer itself.

27.   The effect of growing urbanization has been to augment daytime temperatures on sunny days, owing to increased amounts of infrared radiation emanating from proliferating buildings and pavement.

28.   The ground cools because it loses more infrared radiation than it receives from a cloudless, nighttime atmosphere.

29.   The most widely sold ear thermometers for home use contain something called a pyroelectric sensor, a detection device that responds to infrared radiation.

30.   The star made itself known through its infrared radiation, whose long wavelengths are able to wind their way between the specks of cosmic pollution.