This website uses cookies to ensure you have the best experience. Learn more

Light And Colour. Essay

1582 words - 6 pages

You're reading this to learn a little about light. Well, you're going to learn a lot. Right now scientists are still trying to figure out the connection betIen light and matter. Scientists began studying light a long time ago. A big breakthrough happened when Newton started to break light up with prisms in the late 1600s. Only recently have scientists begun to understand how light works and its connection to everything in the Universe.How "Fast" is the Speed of Light?Light travels at a constant, finite speed of 186,000 mi/sec. A traveler, moving at the speed of light, would circum-navigate the equator approximately 7.5 times in one second. By comparison, a traveler in a jet aircraft, moving at a ground speed of 500 mph, would cross the continental U.S. once in 4 hoursLet's take a moment to talk about visible light. As you can tell by the name, visible light is the light I can see as humans. More specifically, you see the light that is not absorbed by objects. For example... Green plants are green because they absorb all of the colours of the visible spectrum except the green colour (you could also say the green wavelengths). A red wall is red to your eyes because it is not absorbing light from the red wavelengths. Mirrors reflect all of the colours of visible light.We describe the world the way we see it as humans. Other living things on Earth see the world in different ways. Dogs only see things in black, white and gray. Some insects see colours that none of us can see. When you are learning about visible light you should remember I mean visible to humans. And then of course I should mention that not all humans can see all the colours. There is something called colour-blind that affects many men. Colour-blind men cannot see certain colours of the spectrum. It has to do with a genetic defect in their eyes.What are colours?Now I must introduce you to Mr. Roy G. Biv. Was he a scientist? No. Did he create great optics and telescopes? No. He is not even a he. ROY-G-BIV is the acronym that represents all of the colours in the visible spectrum of light. It's like this...R - RedO - OrangeY - YellowG - GreenB - BlueI - IndigoV - VioletNot only are those the colours we can see as humans, but they are also in the right order. Red has the longest wavelength and violet has the shortest. You could also say that red is the least energetic and violet is the most energetic of the visible spectrum. Very helpful.Waves of lightAll types of light move in wave-like patterns. In each wave pattern you can see that there are high points and low points. The distance betIen two high points, or low points, is called the WAVELENGTH. Scientists use the Greek letter LAMBDA to describe that distance. Depending on what type of light you are talking about, each type has a different lambda, or wavelength. All of the wavelengths of light together are called the EM (electromagnetic) SPECTRA.Packets of lightNot only does light move in waves, it also moves with a flow of little...

Find Another Essay On Light and colour.

Expiriment- Colours Essay

593 words - 2 pages until the spectrum of colours formed.4.Various coloured filters were placed between the light and the prism to see the spectrum change colour. Results were recorded.Results:Colour of FilterColours Seen in SpectrumRedMainly RedYellow Yellow with Green & RedBlueBlue with small amount of GreenGreenGreen with small amount of Yellow & BlueOrangeOrange with Red & small amount of greenPurplePurple, but seemed dilutedCyanCyanThe experiment

Color perception principles Essay

2060 words - 8 pages Our contemporary understanding of the concept of colour is rooted in Newton's work, Optics (1730), in which he demonstrated that white light was made up of coloured light. Soon after the publication of Optics, physicists were able to show that visible light resulted from electromagnetic waves of a cetrain frequency. The area of the electro-magnetic spectrum that we see as light lies between frequencies of 360 nanometres and 760 nanometres

Light wavelength effect on the photosynthetic rate of elodea

2079 words - 8 pages Introduction:The rate of photosynthesis varies greatly with changes in wavelengths of light. Light's colour is determined by its wavelength of light, and thus it is possible to devise an experiment to determine which wavelengths of light are most productive for photosynthesis than others.In this experiment I use a plant called Elodea (pond weed). Elodea is native to North America and it is also widely used as aquarium vegetation. The basic


1077 words - 4 pages physical energy into neural movement. The eye is made up of many different parts to which enables vision. the iris which is the coloured part opens and closes allowing more or less light into the eye through The pupil, the lens focuses the light, the fovea, which is the centre of the retina is the area of sharp vision, has the thickest supply of photoreceptors specifically for colour. The optic disc has no receptors, therefore forming the blind spot

Elements of Design

1666 words - 7 pages organic form. Light is what lets you experience colour. The pigment of the retina in your eyes is sensitive to different lengths of light waves which allows you to see different colours. The wavelengths of light that humans can see are called the visible colour spectrum. Hue is the common name for the colours in the spectrum which are red, orange, yellow, green, blue, and violet. A pigment is a colouring agent such as paint or dye that reflects

colour physics

682 words - 3 pages Colour Physics 712 words 1.     Colour physics, dispersion of sunlight into colours of the spectrum. (Sir Isaac Newton 1676) Discuss and illustrate Newton’s experiments and beyond, from particle to wave theory. 2.     Research, identify and illustrate how the eye sees colour, reference to light emitted, transmitted and reflected. 1. Sir Isaac Newton, held the theory that light was made up of

Compare/Contrast Essay: Chameleon Condition

1090 words - 4 pages ;. By adding in another colour we see light contrast, and how light affects the tone of the colour. This darker blue can be interpreted as uncertainty, he does know if he's guilty for what he did, or disappointed that he did it. We can see yet another, amongst many, good example of Adam's emotion turning into a visible colour; "But the ghastly, neon, or the street lamps, he saw his purple hands, his purple wrists, his purple arms. His


1215 words - 5 pages Principles and Elements of Design: By: Cheryl  Elements: Colour:  colour is the main element in any piece of artwork, it is the most eye catching, the most appealing, the one thing that tells you whether or not this piece of art suits you taste or not. It simple exists because of the light surpassing in the room to create different colours. The picture to the right, well demonstrates the element of colour because the colours are bright and

The Handmaid's Tale: The Class Distinction and Function of Society based on Colour

1455 words - 6 pages for women throughout the novel vary from red, light green, light blue, stripes of the three, and light brown. The similarity between these colours is that fact that they are all light. The light colours group women as one, but the individual colours completely separate them. Outfits of the women are light in colour to be interpreted as a lacking sign of power and stripping of rights. Everything for the women is dull and no matter their distinction

Blanching and Browning of Apples

1421 words - 6 pages Peroxidase test. The ph of this treatment was 7. There was brown colour formation in the treatment sample after being left for 60 minutes. The apple had Rapid enzymatic browning without its skin, its natural protection and preserver. (Mc Gee, 2009)ii.80oC water, 30sec –The colour development time of this treatment was 78 seconds in the Rapid Peroxidase test. The ph of the water was 7. There was light brown colour formation in the treatment sample

The elements of design - line, colour, tone, shape, space etc

1251 words - 5 pages : Light ( cool )Low Value : Dull.Intensity : Refers to the brightness or dullness of a colour.High Intensity : BrightLow Intensity : DullLocal Colour: Is the actual colour of objects. e.g. Yellow is the colour of Lemon.Monochromatic : When colour arrangement is made with one colour with shades andtints ofthat colour.Dominant Colour : When one colour in a composition, with its shades that are largelyused.Achromatics : Black and White and the mixture of

Similar Essays

Colour Theory Essay

1525 words - 7 pages . Unlike the RYB mixing model the RGB model relies on the additive colour mixing technique. This means that when the colours are mixed they do not become darker and instead become lighter (as seen in fig.2) until finally they become white when they are all mixed in even amounts. The RGB Colour mixing model is commonly used in Photography, Television, Computers and most technology relying on light and pixels because it allows for the creation of

Colour Ontology Essay

751 words - 4 pages relations between the process of understanding of existence which provide the truth and definitive including the possibility facts of the existence. While the word colour in the 7th Edition of Oxford Advanced Learner’s Dictionary is defined as: “The appearance that things have that results from the way in which they reflect light.” Colour can be identified by two different methods which are objectively and subjectively. The terms objectively in

Using Artists Of Your Choice Discuss The Ways In Which An Artist (Or Artists) Have Privileged Colour As An Means Of Artistic Expression

1806 words - 7 pages Claude Monet, August Renoir, Edouard Manet, Edgar Degas, Mary Cassatt and Berthe Morisot. The Impressionists objective was to be true to nature. They used truthful colour and applied the paint in small strokes allowing them to paint the colour sensations and registering the changing effects of the light.'These artists were painting what they saw, not what they new was there; perception, not appearance'Mont Sainte-Victoire Seen from Les Lauves - 1902

Interior Decor Essay

813 words - 3 pages and architectural aspects must be considered.Aspects of colourPsychological effects:-Colour gives character to a room. It creates an atmosphere I.e.colour adds warmth t cheerfulnes, peace and quiet to a room.Reds yellows reds browns and the their shades are warm .These are also considered to be stimulating colours.Pale green and blue ,and all light shades give a restful appearance.Pale blue is fresh and cool but dark blue can be depressing.Green