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Description
Mind Map by Jonald Ferrer, updated more than 1 year ago
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Created by Jonald Ferrer
almost 4 years ago
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Light and Optical Systems
- History of Light
- Newton used the failure of the wave theory to prove that light is made of particles. Newton concluded
that light is composed of colored particles that combine to appear white
- Pythagoras believed beams of light were made of tiny particles and the eyes detected these particles and
allowed us to see.
- Euclid states that light travels in straight lines and reflects from a surface at the same angle at which it hit it.
- Al -Haytham wasthe first to explain that vision occurs when light reflects from an object and then passes to one's
eyes.[27] He was also the first to demonstrate that vision occurs in the brain, rather than in the eyes
- Albert Michelson was known for measuring the speed of light and especially for the Michelson–Morley experiment.
- Newton used the failure of the wave theory to prove that light is made of particles. Newton concluded
that light is composed of colored particles that combine to appear white
- Sources of Light
- Sun
- Fire
- Torch
- candle
- star
- Sun
- Optical Devices
- Telescopes
- refractor
- use lenses to focus light
- Hans Lippershey made the 1st refracting telescope in 1608
- Hans Lippershey made the 1st refracting telescope in 1608
- use lenses to focus light
- reflaction
- uses mirrors to focus light
- Newton made the 1st working reflector telescope in 1668
- Newton made the 1st working reflector telescope in 1668
- uses mirrors to focus light
- refractor
- periscopes
- microscopes
- infrared cameras
- contact lenses
- eye glasses
- Telescopes
- What is Light
- The form of energy that we can see
- Properties of Light
- Rectilinear Propagation
- Light Reflects
- Light refracts or bends when it travels from one material to another because it changes speed slightly
- Light disperses into all the colors that make up WHITE light (red, orange, yellow, green, blue, indigo
and violet) when it passes through a prism because each color is a different wavelength and is bent a
different amount
- Light travels through a vacuum (that is, light does NOT require particles of matter to travel) which is
why we see light from faraway stars even through empty space
- Light travels through objects to different degrees (e.g. a window pane vs a frosted window pane vs a
wooden door)
- Light travels through objects to different degrees (e.g. a window pane vs a frosted window pane vs a
wooden door)
- Light travels through a vacuum (that is, light does NOT require particles of matter to travel) which is
why we see light from faraway stars even through empty space
- Light disperses into all the colors that make up WHITE light (red, orange, yellow, green, blue, indigo
and violet) when it passes through a prism because each color is a different wavelength and is bent a
different amount
- Light refracts or bends when it travels from one material to another because it changes speed slightly
- Light Reflects
- Rectilinear Propagation
- The form of energy that we can see
- Transmission of Light
- Opaque
- Transparrent
- Translucent
- Ray diagrams and Shadows
- Opaque
- Laws of Refection
- Ray model of light
- Plane mirror
- Convex and Concave
- Ray model of light
- Refraction of Light through different materials
- Glass and Water
- Double Convex Lens, Double Concave Lens
- Electromagnetic Spectrum (Radio Waves, Microwaves, Infrared Light, Visible Light (ROYGBIV),
Ultraviolet Light, X-Rays, Gamma Rays)
- Electromagnetic Spectrum (Radio Waves, Microwaves, Infrared Light, Visible Light (ROYGBIV),
Ultraviolet Light, X-Rays, Gamma Rays)
- Double Convex Lens, Double Concave Lens
- Glass and Water
- Human Eye (Anatomy and function) compared to a Traditional Camera (Anatomy and Function)
- There are many similarities between the human eye and a camera, including: a diaphragm to control the
amount of light that gets through to the lens. This is the shutter in a camera, and the pupil, at the
center of the iris, in the human eye. a lens to focus the light and create an image. The image is real and
inverted. a method of sensing the image. In a camera, film is used to record the image; in the eye, the
image is focused on the retina, and a system of rods and cones is the front end of an image-processing
system that converts the image to electrical impulses and sends the information along the optic nerve
to the brain.
- Diiferences of Human Eye and Camera
- Human Eye
- Lens Focus: the lens changes shape to focus: The muscles in your eyes change the actual shape of the lens inside
your eyes.
- Sensitivity to light: The human retina is not unifornml sensitive to light.
- the human eye is a subjective device. This means that your eyes work in harmony with your brain to
create the images you perceive: Your eyes are adjusting the focus (by bending the light through the lens
in your eyeballs) and translating photons (light) into an electrical impulse your brain can process.
- the human eye is a subjective device. This means that your eyes work in harmony with your brain to
create the images you perceive: Your eyes are adjusting the focus (by bending the light through the lens
in your eyeballs) and translating photons (light) into an electrical impulse your brain can process.
- Sensitivity to light: The human retina is not unifornml sensitive to light.
- Lens Focus: the lens changes shape to focus: The muscles in your eyes change the actual shape of the lens inside
your eyes.
- Camera
- Lens focus: In camera, the lens moves closer/further from the film to focus.
- Sensitivity to light: A film in a camera is uniformly sensitive to light.
- A camera, on the other hand, is an absolute measurement device — It is measuring the light that hits a
series of sensor, but the sensor is ‘dumb’, and the signals recorded need to be adjusted to suit the color
temperature of the light illuminating the scene
- A camera, on the other hand, is an absolute measurement device — It is measuring the light that hits a
series of sensor, but the sensor is ‘dumb’, and the signals recorded need to be adjusted to suit the color
temperature of the light illuminating the scene
- Sensitivity to light: A film in a camera is uniformly sensitive to light.
- Lens focus: In camera, the lens moves closer/further from the film to focus.
- Human Eye
- Diiferences of Human Eye and Camera
- Similarities Human Eye and Camera
- There are many similarities between the human eye and a camera, including: a diaphragm to control the
amount of light that gets through to the lens. This is the shutter in a camera, and the pupil, at the
center of the iris, in the human eye. a lens to focus the light and create an image. The image is real and
inverted. a method of sensing the image. In a camera, film is used to record the image; in the eye, the
image is focused on the retina, and a system of rods and cones is the front end of an image-processing
system that converts the image to electrical impulses and sends the information along the optic nerve
to the brain.
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