1. Visible light has wavelengths between 400-750 nm that can be detected by the human eye. 2. When white light passes through a prism, it is dispersed into the colors of the visible light spectrum due to differences in wavelength. Sir Isaac Newton was the first to observe this using a prism in 1672. 3. Applications of visible light include rainbows, remote sensing using satellites, and spectrophotometers which measure light absorption and emission to analyze material properties and concentrations.

1. VISIBLE
LIGHT
Created By Group 4
Maulana Dzaki
Maulidiawati Khoirunnisa
Muhammad Ibra
Mohamad Irdiana F

2. WHATIS VISIBLE LIGHT
• Visible light as electromagnetic waves radiation is most
known by humans can be defined as part of the spectrum of
electromagnetic waves that can be detected by the human
eye

3. WAVE LENGTH AND
FREQUENCY
• Human can see wave between :
λ = 75O-39O nm and
f =4OO-79O THz [1 THz = 1O12 Hz ]
The Visible Light has :
• Wave length = 72O – 4OO nm
• Frequention = 4OO – 789 THz
*TerraHertz [THz] is super fast waves that could
potentially be used to harness part of the electromagnetic
spectrum between infrared and microwave light .

4. COLOR WAVELENGTH
Color Frequency Wavelength
violet 668–789 THz 380–450 nm
blue 631–668 THz 450–475 nm
cyan 606–630 THz 476–495 nm
green 526–606 THz 495–570 nm
yellow 508–526 THz 570–590 nm
orange 484–508 THz 590–620 nm
red 400–484 THz 620–750 nm

5. WAVELENGTH

6. HOW IT HAPPEN
When white light shines through a prism, the white light
is broken apart into the colors of the visible light
spectrum. Water vapor in the atmosphere can also break
apart wavelengths creating a rainbow.

7. • White light is actually made up of a whole range of colours,
mixed together.
• Pass white light through a glass prism - the violet light is bent
("refracted") more than the red, because it has a shorter
wavelength and is slowed down more by the glass.
• This is called 'dispersion', and allows us to work out what stars
are made of by looking at the mixture of wavelengths in the
light.

8. DISCOVERER
Hasan Ibn al Khaitam
The Book of Optics
( ‫ا‬‫كتاب‬‫المناظر‬ ,translit. Kitāb al-
Manāẓir; Latin: De
Aspectibus or Perspectiva; Italian: De
li Aspecti) (965-1040 M).
The first theory if light can
be refract and bounce

9. FIGURE
• Roger Bacon :
is the first person who marked
that spectrum shows in a glass of
water in the 13th century.
(1219 - 1292 M)

10. FIGURE
• In 1672, Sir Isaac
Newton was the first to
test the visible light from
the sun that through on a
prism and produces a
bearn of light.
• Newton devided the
spectrum into seven
colors > Red, Yellow,
Orange, Green, Blue,
Indigo, and Violet. 25 December 1642 – 20 March 1726

11. ORIGIN/SOURCE
The surface of the
Sun is around 5,600
degrees, and it
gives off a great
deal of light.
This is how light bulbs
work - an electric current
heats the lamp filament
to around 3,000 degrees,
and it glows white-hot.
• The rays of light appear to be caused by heat. Objects with lower
temperatures emit infrared radiation that the eye can not see. But
if the temperature is hotter, the wavelength will be shorter and
brighter, changing from red to yellow then to white; this white
light can be seen with the human eye. In addition to the sun and
lights, there are also liquid materials, such as metal or glass, also
glowing radiating light.

12. APPLICATION
• Rainbow
• Remote sensing overview
• Spectrophotometer
• Underwater communication

13. RAINBOW
Why do we can see rainbows in the sky?

15. Apparently, this is because red light on a
rainbow is the light spectrum that has
• the longest wavelength or
• has the lowest frequency than the other light
spectrum in the rainbow
• least refracted color
So in the red rainbow always on top
Color purple is always below this is none
other because the wavelength in low light
purple or has the highest frequency, and most
refracted color.
Why the red color in the rainbow
always above ??

16. SPECTROPHOTOMETER
• Spectophotometer is a tool that used to apply
spectophotometric method. The principle is the
measurement of the concentration of the sample
based on the interaction between material with light.

17. SPEKTROFOTOMETRI

18. SATELITE

19. SATELITE

20. REMOTE SENSING
OVERVIEW
• Remote sensing is a technique to obtain information
in the form data or images of an object, or area is
being observed.

21. THE BENEFITS OF REMOTE
SENSING OVERVIEW
• Manufacturing map [ Bidang Pembuatan Peta
]
• Field of Geophysics, Geology, Geodesy, and
Environment.
• Hydrology [ LANDSAT, ERS, SPOT ]
• Field of meteorology [ Meteosat, Noaa, and
Iros ]
• Field of oceanography [ Seasat, Marine ]

22. CONCLUSION
• Visible light waves are the only electromagnetic
waves we can see.
• Visible light wave has a wavelenght (λ) is 400 -
720 nm, while Frequency (f) of visible light wave
is 400 - 789 THz. *1 THz=1012Hz.
• Sir Isaac Newton was the first to test the visible
light from the sun that through on a prism and
produces a bearn of light that can divided into
several colors.
• Application: Satellite, Spectofotometer, and
rainbow.

23. 1. What is colour that has the shortest wavelenght?
a. Red
b. Violet
c. Green
d. Yellow
2. How long wavelength of violet colour?
a. 620-750 nm
b. 590-620 nm
c. 380-450 nm
d. 450-475 nm
SAMPLE PROBLEM

24. BIBLIOGRAPHY
• www.slideshare.net/mobile/NurLatifah1/cahaya-
tampak-12
• http://wahyuniieka.blogspot.co.id/2013/10/spektrofoto
metri_26.html
• https://wanibesak.wordpress.com/tag/prinsip-kerja-
spektrofotometer/
• http://hsaidnuraeni.blogspot.co.id/2015/02/apa-
pengertian-manfaat-cahaya-tampak.html