1. In 1800, Sir Frederick William Hershel discovered infrared radiation beyond the red part of the visible light spectrum using a thermometer with a blackened bulb. 2. Infrared radiation has longer wavelengths than visible light, ranging from 0.7 to 300 micrometers. It was originally called "calorific rays" and is now called infrared. 3. Infrared radiation is divided into categories based on wavelength bands such as near, short, and far infrared.

1. Submitted by: Mohammed Hisham Yakub Computer Science

3. 1800 by Sir Frederick William Hershel Thought colors were associated with heat Used 3 thermometers with blackened bulbs (measure heat of different colors) Studied beyond red light. It was called “Calorific Rays”. Which is now known as “Infrared Rays” in the late 19 th Century.

4. Prism Mirror

5. Infrared (IR) light is electromagnetic radiation with a wavelength longer than that of visible light, starting from the nominal edge of visible red light at 0.7 micrometers, and extending conventionally to 300 micrometers. The Origination Of The Word The name means below red, the Latin word “ infra” meaning "below". Red is the color of the longest wavelengths of visible light.

6. Near-Infrared (0.7 µm – 1.4 µm) Short-Infrared (1.4 µm – 3 µm) Mid-Infrared (3 µm – 1000 µm) Long-Infrared (8 µm – 15 µm) Far Infrared (15 µm -1,000 µm)

7. Band Descriptor Wavelength Range O Band Original 1260 – 1360 nm E Band Extended 1360 – 1460 nm S Band Short Wavelength 1460 – 1530 nm C Band Conventional 1530 – 1565 nm L Band Long Wavelength 1565 – 1625 nm U Band Ultra long Wavelength 1625 – 1675 nm

9. Infrared light from the Sun only accounts for 49% of the heating of the Earth. Objects at room temperature will emit radiation.

14. Infrared light from the LED of an Xbox 360 remote control as seen by a digital camera. IR Filter in a Camera

17. IR Satellite picture Weather Map

18. Infrared Reflectograms . The Arnolfini Portrait by Jan van Eyck, National Gallery, London

19. Used for treatment of chemotherapy induced oral ulceration as well as wound healing.

20. The Spitzer Space Telescope is a dedicated infrared space observatory currently in orbit around the Sun. NASA image.

27. NASA, ESA, ISAS are doing research in space. How planets, stars, galaxies are formed. Finding new possible life on other Planets.

31. Hazards to the eyes and the vision. Point – Point lasers can cause burns. Cancer and Leukemia.