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2. Devi AnastasyaPutri

4. HISTORY OF WAVE INFRARED RAYS In 1880 In 1900 In 1856 Astronomers used thermocouples (devices that convert heat into electric current) to detect infrared radiation from other objects Infrared radiation successfully detected from Jupiter and Saturn and from some bright stars such as Vega and Arcturus. Sun emits infrared radiation

5. EXPLANATION An electromagnetic rays that longer than visible light rays INFRARED Frequency between 500 - 4x105 hertz Wave length from 7,8x10-4 until 1 mm The infrared light will be invisible but the resulting heat radiation still can feel or detect

9. APLICATION Health activate water molecule in body and increasing metabolism 2. Night vision infrared is used in night vision equipment when there is insufficient visible light to see Thermograph to determine the temperature object if the emissivity is known 4. Tracking use the emission from the target of electromagnetic radiation in the infrared part of the spectrum to track it 5. Heating infrared rays can be used as a deliberate heating source

10. 6. Communication infrared lasers are used to provide the light for optical fiber communications system 7. Spectroscopy is a technique to identify molecules by analysis of their constituent bonds Meteorology weather satellites equipped produce infrared image which can use to determine clouds heights and types 9. Climatology in the field climatology atmospheric radiation is monitored to detect trends in the energy between earth and atmosphere Astronomy observe object of the electromagnetic spectrum

11. CONCLUSION Infrared rays found by William Herschel in 1880, this ray have wavelength between 7,8 x 10-4 until 1 mm. it has advantage for many kinds of subject in our life such as in health, astronomy, terminology, etc. But usually use protective personal equipments when touching with strong infrared because it danger for health especially for our eyes, infrared rays can produce by the vibrated molecule that caused by heating