Mr. Chapman Science 8.  As we all know by now (I hope!) the visible spectrum of light is all the colours that you can see in the rainbow – ROY G. BIV.

Slides:

Advertisements

Similar presentations

Chapter 2: Section 2 Visible light and Color

Advertisements

Color.

How Do We Mix Color? How do determine complimentary color?

The Colour of Light & The Colour of Objects. Colour by Addition Sir Isaac Newton first discovered that visible (white) light was made up of many colours.

Light and Color. Light interacting with matter When light hits matter, at least one of three things can happen: – Reflection When light bounces off an.

CP Physics Mr. Miller. General Information  Sir Isaac Newton – first to realize white light composed of different colors  Prisms – separate white light.

Buxton & District U3A Science Discussion Group “What is Yellow?” John Estruch 16 January 2015.

SNC2D. Primary LIGHT colours are red, green, and blue SECONDARY light colours are created by combining only two of the three primary colours of light.

How do we see colour?. Electromagnetic Energy being transferred by the Sun.

Additive Primary Colors and Subtractive Primary Colors

How do we perceive colour? How do colours add?. What is colour? Light comes in many “colours”. Light is an electromagnetic wave. Each “colour” is created.

Chapter 28 Color. Spectrum: The spread of colors seen when light is passed through a prism or diffraction gradient.

ROY G BIV The natural light that we see coming from the sun is generally perceived as white light. But we have all seen colored light in the form of a.

1 Light. 2 Visible Light Wavelengths range from 400 nm to 700 nm Longest wavelength = red Shortest wavelength = violet 1 nm = 1 x m.

Colour Theory – Addition and Subtraction Theory

25.2 The human eye The eye is the sensory organ used for vision.

12.2 Essential Questions How do you see color? What is the difference between light color and pigment color? What happens when different colors are mixed?

What title would you give to each droodle?. Almost bald man with a split-end.

Chapter 16 Light and Color  16.1 Properties and Sources of Light  16.2 Color and Vision  16.3 Photons and Atoms.

TOPIC 4.3 SNC2P. Lesson Goals Today we will learn that: colours of light can be added together to form a variety of colours through two investigations.

Unit – K3 Refraction + Colour 6th June 2007 Form Group 8_y.

Colours of light can be added together to form a variety of colours.

Looking at Colors! and Colored Light Lessons 11 & 12.

Color and Vision General Physics. Band of Visible Light ROYGBIV (Red, Orange, Yellow, Green, Blue, Indigo, Violet)

Now let’s focus on… The visible spectrum The visible spectrum –Light and pigment.

Light Coach Dave Edinger J. C. Booth Middle School Physical Science (8A)

Color Theory. Which colours is white light made of?

Light and Color. Light interacting with matter When light hits matter, at least one of three things can happen: Reflection When light bounces off an object.

Light and Color There are 3 primary colors of light RED, GREEN, & BLUE

Ch Light II. Light and Color (p )  Light and Matter  Seeing Colors  Mixing Colors.

Wave Model of Light – Explains most properties of light – Uses both light and waves to transfer energy, and they both go outward in all directions from.

IPC Notes Light & Color. The colors of light that we see are the colors of light that an object reflects towards our eyes. ex) blue jeans absorb all colors.

Colors of Pigment The primary colors of pigment are magenta, cyan, and yellow. [

Lesson 2. Review - Energy in a Wave A wave is a disturbance that transfers energy from one point to another without transferring matter. In a water wave,

4.3 Mixing Colours (p ) (p ). Primary Colours The 3 primary colours can be combined to generate any other colour: Red Green Blue.

Colour D. Crowley, 2008.

10.1 Wave model of light Colour Theory. Wave Model of light Remember: Light waves transfer energy Light moves outward in all directions from its source.

Unit 3 Light and Optical Systems Topic 6 The Source of Colors Remember to name and date your notes!

The Source of Colours Topic #6. What were they thinking?  At one time, people believed that colour was something that was added to light  When white.

 There are 3 primary colors of light RED, GREEN, & BLUE  When these colors of light are mixed… White Light is produced  This process is called color.

Light and Color. An objects color depends on the wavelength of light it reflects and that our eyes detect. White light is a blend of all colors. When.

13.2 Light and Color We see color because white light strikes a surface and the color the surface is, is reflected back to your eye. All the other colors.

The Visible Spectrum And how we see it. What is Visible Light? The cones in the eye are only sensitive to a narrow range of EM frequencies. Visible Light.

Colour Explain why an object appears to be a certain colour.

Standard: Explain how the human eye sees objects and colors in terms of wavelengths What am I learning today? How are wavelengths detected by the human.

Section 4 Color.

Warm Up Between Red or Blue light, which has a larger

25.2 The human eye The eye is the sensory organ used for vision.

The Colour of Light: Additive colour theory.

Additive Colour Theory

Subtractive colour theory

Colour Theory of Light Grade 10 Optics

Why does a blue shirt look blue?

Polarization Polarized light—light waves that vibrate in a single plane Polaroid filters block one plane of light waves.

18.1: Light Key concepts: What happens to the light that strikes an object? What determines the color of an opaque, transparent, or translucent object?

Electromagnetic Spectrum

Mixing coloured lights

Colour Theories.

Colours of light can be added together to form a variety of colours

Two ways to discuss color 1) Addition 2) Subtraction

Light & Color When light passes through a prism, refraction causes the visible light spectrum.

Chapter 14: Light Section 2: Light and Color

Ch Light II. Light and Color (p ) Light and Matter

Ch Light II. Light and Color (p ) Light and Matter

Presentation transcript:

Mr. Chapman Science 8

 As we all know by now (I hope!) the visible spectrum of light is all the colours that you can see in the rainbow – ROY G. BIV

 Mixing colours together to make other colours is known as addition of colour. The primary colours are blue, green and red.  Notice! These are different than the primary colours that we normally talk about for painting.

 When all three primary colours are added together, they make white light.  Different combinations of the primary colours produce secondary colours.

TV was an incredible breakthrough. It used tiny pixels that each produced one of three colours: red, blue, or green. How does this allow all of the images that you see on the screen?

 When all three primary colours are added together, they also produce white light.  Where have you seen the three primary colours before in your everyday life?

 Yellow is produced by mixing red and green.  Magenta is produced by mixing red and blue.  Cyan is produced by mixing green and blue.

 The human eye has specialized cells that are sensitive to different ranges of colours. These specialized cells are called cones.  There are three types of cones, each sensitive to different ranges of colour: red, green, and blue. When light hits the cones, the cones send messages to your brain.  The colour that you see depends on the type and number of cones responding to the light entering your eye.

 Some people can not see all the colours; some people are colour- blind.  Their cone cells may be defective, causing them to be yellow and green colour blind or red and green coloured blind.  Look at page 144 of your textbook to find out if you are colour- blind.

It gets confusing!

 Coloured sunglasses act as filters which take out, or subtract, some part of light. If an object is red, such as an apple, this means that it is reflecting the colour red.  If the apple is reflecting red that means that it is absorbing the two other primary colours, blue and green.  If green and blue are being absorbed that means that they are being subtracted.

 If an object is yellow, this means that it is a combination of red and green. If red and green are being reflected, then blue is being absorbed (subtracted).  If an object is coloured magenta, this means that it is a combination of blue and red, and a subtraction of green.  When all the colours are absorbed we get black. Black is the absence of colour.