Introducción a los principios de la luz

1. LIGH
T
https://www.youtube.com/watch?v=yXaFC2Hko_E
It´s an electromagnetic ray that travels in a straight line
https://youtu.be/d7yTlp4gBTI

2. TIMELINE OF LIGHT
They have developed
different theories, some
of them related to vision
Ptolemy and their followers believe
that vision occurs when rays
emanate from the eyes and are
intercepted by visual objects
Euclid III B.C
Explains vision with rays
coming from object and
entering the eyes.
Aristotle III B.C
Corpuscular Theory. Light is
composed of “corpuscles” Tiny
particles which travel in straight
line with a finite velocity and
possess kinetic energy
Newton 1672
Ancient Greeks V B.C
This theory seems to be closer to
modern theories, but it didn’t provide
any experimental foundation

3. στλν - “The old corpuscular theory of the
nature of... (tumblr.com)

4. TIMELINE OF LIGHT
Wave Theory.The light
were described as a wave
similar of the sound waves
which travel in a medium
called Eter
They made experiments and
proved the Huygens wave Theory
Young, Fresnel 1815
Proposed that light is made
of finite packets known as a
light quantum.
Max Planck 1900
Proved that light was an
electromagnetic wave similar to
the radio waves
Maxwell 1865
Huygens 1678

5. TIMELINE OF LIGHT
He suggested that light is
made of small particles
called photons
He joined the electromagnetic and
quantum theories and showed the
wave-particle duality.
De Broglie 1924
Einstein 1905
https://youtu.be/J1yIApZtLos

6. LIGHT IS AN ELECTROMAGNETIC WAVE
The color phenomena is
the product of the
interaction between
energy and matter
The angle
between the
magnetic and
electric field is 90°
The height of the crest
determine the bright or
intensity of light
The wavelenght
determine the light color
and the capacity to affect
the photosensitive
material
All the Electromagnetic
waves are transverse in
nature as they oscillate
perpendicular to their
direction of motion.

7. REFLECTION
INCIDENT RAY: The ray of light that falls on the
reflecting surface.
REFLECTED RAY: The ray of light that is sent
back by the reflecting surface.
NORMAL: Line at right angle “90°” to the reflecting
surface to the point of incidence.
It happen when light falls on a surface and it’s reflected back into the same medium, we
say reflection take place. The reflection has the following parts:
Light. Chapter 16

8. When light from an object is
reflected by a surface, it changes
direction. It bounces off at the
same angle as it hits it.

9. https://youtu.be/vt-SG7Pn8UU
WATC
H

10. ACTIVITY
Angles of incidence and
reflection
1. Do the angle of incidence and the angle of reflection equal?
2. What would happen if I threw the light on a mirror along the normal?
Arrangement for showing
reflection
Light. Chapter 16

11. https://youtu.be/_OZN7s0yLlY

12. LIGHT IS MADE UP OF WAVELENGTHS
OF LIGHT
https://phet.colorado.edu/sims/html/color-
vision/latest/color-vision_es.html

13. LIGHT BULB
INFOGRAPHICS
1
2
3
Jupiter is a gas giant and actually also the
biggest planet in the Solar System. It is the
fourth-brightest object in the sky
Saturn is a gas giant in the Solar System,
composed mostly of hydrogen and helium.
Yes, this is the ringed one
Venus has a beautiful name and is the second
planet from the Sun. It’s terribly hot and its
atmosphere is extremely poisonous

14. Mercury is the smallest planet in the Solar System
Jupiter is the biggest planet in the Solar System
Saturn is composed mostly of hydrogen and helium
Mars is actually a cold place. It’s full of iron oxide dust
01
02
03
04
LIGHT BULB INFOGRAPHICS

15. Mercury
Saturn
Venus
Jupiter
Mars
It is the smallest planet in
the Solar System
It is the biggest planet
in the Solar System
It is composed mostly of
hydrogen and helium
It is actually a cold place.
It’s full of iron oxide dust
It has a beautiful name,
but it is terribly hot
LIGHT BULB INFOGRAPHICS

16. Mercury is the
closest planet
to the Sun
Venus has a beautiful
name, also high
temperatures
Saturn is composed
mostly of hydrogen
and helium
Despite being red,
Mars is actually
a cold place
Jupiter is the
biggest planet in the
Solar System
01 02 03 04 05
LIGHT BULB INFOGRAPHICS

17. LIGHT BULB INFOGRAPHICS
Jupiter is the biggest
planet in the Solar
System
Venus has a beautiful
name, also high
temperatures
Saturn is composed
mostly of hydrogen
and helium
Despite being red,
Mars is actually
a cold place

18. LIGHT BULB INFOGRAPHICS
Jupiter is a gas giant and the biggest planet in the Solar System.
It’s the fourth-brightest object in the sky
Venus has a beautiful name, but it’s terribly hot. It’s the second
planet from the Sun in the Solar System
Saturn is a gas giant in the Solar System, composed mostly of
hydrogen and helium. Yes, It’s the ringed one

19. LIGHT BULB
INFOGRAPHICS
Jupiter is a gas giant and also the biggest
planet in the Solar System
It has a beautiful name, but it’s terribly hot,
even hotter than Mercury
Mars is actually a cold place. It’s a planet
full of iron oxide dust
It’s the smallest and closest planet to the
Sun in the Solar System
01
04
03
02

20. LIGHT BULB INFOGRAPHICS
Saturn is a gas giant in the
Solar System, composed of
hydrogen and helium
Despite being red, Mars is
actually a cold place. It’s full of
iron oxide dust
Venus has a beautiful name,
and is the second planet
from the Sun
Jupiter is a gas giant and
actually also the biggest planet
in the Solar System

21. LIGHT BULB INFOGRAPHICS
It’s a gas giant and also
the biggest planet in the
Solar System
It has a beautiful name,
but it’s terribly hot, even
more than Mercury
Mars is actually a cold
place. It’s a planet full of
iron oxide dust
Saturn is the ringed one.
It’s composed mostly of
hydrogen and helium
Mercury is the closest
planet to the Sun and the
smallest one
It has a beautiful name
and is the second planet
from the Sun

22. LIGHT BULB INFOGRAPHICS
It’s composed mostly of
hydrogen and helium
Neptune is the farthest
planet from the Sun
It’s a cold place. It’s full
of iron oxide dust
It’s the smallest planet
in the Solar System
Venus has a very
poisonous atmosphere
It’s the biggest planet in
the Solar System