Gelombang cahaya tampak

1. Visible Light Wave
Gelombang Cahaya Tampak
Group 4
Farhana Nurazizah
Fauziah Marrizka
Irfan Bayu Ramadhan
Mumpuni Nur Izzati

2. Definition
Visible light waves are the only electromagnetic
waves we can see. We see these waves as the
colors of the rainbow. Each color has a different
wavelength. Red has the longest wavelength
and violet has the shortest wavelength. When
all the waves are seen together, they make white
light.

3.  humans can see the waves with λ =
390- 750 nm and f = 400- 790 THz ( 1
THz = 1012 Hz).
 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

4. How to 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.
Each color in a rainbow corresponds to a
different wavelength of electromagnetic
spectrum.

5. Wavelength

6. 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

7. • 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
such as red, orange, yellow,
green, blue, indigo, and
purple.
Figure

8. RogerBacon is
the first
person who
marked that
spectrum
shows in a
glass of water.

9. Aplication

10. Rainbow
Why do we can see rainbows in the sky?

12. 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.
• RogerBacon is the first person who trade marked
that spectrum shows in a glass of water.
• Application: Satellite, Spectofotometer, and
rainbow.

13. 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~

14. 3. Who is the figure that marked spectrum shows in a
glass of water?
a. Isaac Newton
b. James Clark Maxwell
c. Christian Huygens
d. Roger Bacon
4. 1 THz = ….. Hz
a. 1010
b. 1012
c. 1011
d. 106
Sample Problem~

15. Thank You…