Sir Frederick William Herschel was a German-born astronomer who discovered the planet Uranus and infrared radiation. He discovered infrared accidentally while conducting research to filter sunlight for viewing the solar system. Infrared radiation has wavelengths longer than visible light but shorter than microwave radiation. It is emitted or absorbed by molecules and detected as heat. Infrared has many applications including night vision, temperature measurement, medical therapy, and wireless communication.

1. By GROUP 3

4. Sir Frederick William Herschel
(born in Hannover, 15
November 1738 - died in
London, August 25, 1822 at
the age of 83 years) was a
German-born astronomer
known for his British-
discovered the planet Uranus.
He also discovered infrared
radiation and make other
discoveries in the field of
astronomy.

5. discovery process
Infrared were discovered accidentally, while
he was conducting research looking for
materials to be used in optical filter to reduce
the brightness of the image of the Sun in the
solar system telescope.

6. function
In the field of health :
• Enable water molecules in the body
• Improving micro circulation.
• Increases the body's metabolism
• Develop Ph in the body
• Long distance infrared is widely used in health
equipment.

7. in the field of communication :
• The infrared sensor system
• The invisibility that utilizes the camera's
infrared light
• To view imagery such as nightscoop
• Infrared is used for short range
communication, such as on the remote TV.
• As a means of controlling communications
over long distances
• As one of the standardization of wireless
communication

8. Industrial Fields :
• Infrared lamps
• Infrared warming

9. KINDS / TYPES
Far infrared

10. Near Infrared
has a wavelength of 0.75 - 1.5μm

11. Medium Infrared
Has a wavelength of 1.50 - 10 μm

12. Far Infrared
Has a wavelength of 10-100 μm

14. CHARACTERIS
TIC
Can not be seen
by humans
Can not penetrate
not transparent
materials
Can be caused by
components that
generate heat
The wavelength of the
infrared have a relationship
with the opposite or inverse
temperature. As the
temperature increases, the
wavelength decreased

15. application

16. Infrared excess in sending data :
• Sending data with an infra-red can be done
anytime, because it does not require shipping
with infrared signals.
• Sending data with an infra-red can be said to
be easy because of the simple tool included.
• Sending data from your mobile phone no cost
(free).

17. Weakness in the infrared data transmission.
• On sending data via infrared, infrared both
holes should be facing each other. This is
somewhat troublesome us in transferring data
because a troublesome way.
• Infrared is very harmful to the eyes, so do not
though an infra-red beam on the eye.
• With infrared data transmission can be said to
be slower than with his Bluetooth.

18. Sample problem
The following sequence of electromagnetic waves
from low frequency to high frequency is …
A. visible light, ultraviolet light, gamma rays
B. infrared rays, X-rays, visible light
C. X-rays, infrared rays, ultraviolet rays
D. ultraviolet light, visible light, infrared light
E. TV waves, ultraviolet rays, infrared rays

19. • 1. all objects that have a temperature,
definitely has an infra-red
• 2. the infrared range is divided 3 is Near
Infrared, Medium Infrared, Far Infrared

20. • http://www.scribd.com/doc/19464726/Makalah-Sinar-Inframerah
• http://id.wikipedia.org/wiki/William_Herschel
• http://indo-fisika.blogspot.com/2009/10/sejarah-infra-merah.html
• http://id.wikipedia.org/wiki/Inframerah
• http://ourn0tes.wordpress.com/2010/03/17/pengertian-infrared/
• http://www.scribd.com/doc/19464726/Makalah-Sinar-Inframerah
• http://www.diwarta.com/kelebihan-dan-kekurangan-sinar-infra-
merah-dalam-kesehatan/588/
• http://www.ir-family.com/id/teknologi-inframerah-dari-militer-
untuk-sipil.html
• http://safety.tigaem.net/5/214-Kacamata-Infra-Merah.html