Light And Synthesis Essay

When a beam of sunlight passes through a specially shaped glass object called a prism, the rays of different wavelengths are bent at different angles. The bending breaks up the sunlight into a beautiful band of colors. This band contains all the colors of the rainbow and is called the visible spectrum. At one end of the spectrum, the light appears as violet. It consists of the shortest wavelengths of light that we can see. Farther along the spectrum, the light has increasingly longer wavelengths. It appears as blue, green, yellow, orange, and red, each shading into its neighboring colors in the spectrum. The longest wavelengths of light that we can see appear deep red in color. Some descriptions of the spectrum also mention the color indigo, which is closely related to blue, between violet and blue.

What is emitted (or reflected) from the eyes as an individual takes in and processes visual information are quanta of light. It is the qualities of this light (including color, intensity, and wavelength) that lead to a range of processes such as transduction that are translated by the brain into meaningful images.

Light is a type of energy. Light behaves like a wave because it acts as a disturbance in the magnetic and electric field of space. Light can behave as a particle, because it sends all its energy to one place. A particle of light is called a photon. Photons can be absorbed into objects, bounce

When light reaches an item with colour for example a banana ,the item attracts some of the light and reflects the rest of it. The wavelengths are reflected or absorbed depending on the characteristics of the object. When you look at a banana, the wavelengths of reflected light depending on what color you see. The light waves reflect off the banana peel and reaches the retina at the back of your eye. That's where cones come in. Cones are one type of photoreceptor, the tiny cells in the retina that respond to light. When light from the banana reaches the cones, it changes them to different levels. The outcome is split along the optic nerve to the visual cortex of the brain, which processes the information and returns with a colour, yellow.

Now, let's talk about absorption and emission lines. “Absorption lines are often superimposed on a colored continuum.” (Same website as spectral lines) Absorption lines are also a result of specific wavelengths being absorbed along the line-of-sight. Emission lines are sort of the opposite, they appear as discrete colored lines that are most commonly on a black background. These lines correspond to specific wavelengths of light emitted by an object.

When light passes from one medium to another, air to water for example, part of the light is reflected at the boundary and part of the light gets bent as it passes on to the new medium. The bending of this light is referred to as refraction. A sketch of this is shown below.

It is truly possible that one person may see the color red differently than someone else. The reason colors are perceived differently is because of the cones and the rods in the eyes which present colors to the human brain. When light comes in connection with an object, that object then absorbs some of the light and reflects the remaining light that gives us the colors we perceive. Wavelengths are reflected or absorbed depending on the properties of the images. It has been reported that humans have up to seven million cones and almost all of them are condensed on the retina called the fovea centralis. The fovea centralis is known as the sharp central vision of the eye. Its primary function is to provide visual details for activities such as driving and reading. Light rays are transmitted through the eye by passing through the cornea, the pupil, and then striking the light sensitive nerve cells (rods and cones) in the retina. Visual processing actually begins in the retina and light energy produces chemical changes in the retina's light sensitive cells. These cells create electrical activity, giving us the images that we see today.

They have a natural frequency, which they are more likely to vibrate. The electrons are set into vibrating motion when a light wave of the same natural frequency interacts with the atom (Classroom, 1996). Hence, this also applies to the object with electrons at the same vibrating frequency as the light wave (Anttu et al., 2014). During the vibration, the electrons and its neighbouring atoms interact to convert its vibrating energy into thermal energy. Then, the light wave of the specified frequency is absorbed by the object which is seldom going to be released as a form of light. The object itself does not contain the colour. Instead, it consists of atoms that are able to selectively absorb one or more frequencies of visible light which reflect on its surface (Ellis, 2005). For example; the object will become visible green in the presence of white light (ROYGBIV - Red, Orange, Yellow, Green, Blue, Indigo and Violet) when it absorbs all the frequencies of visible light excluding the frequency related with green light (Classroom, 1996). Hence, all of the vegetation in the photograph is visible in green by allowing the frequency of light to be selectively absorbed into the object and create vibration with the electrons except for the frequency associated with green light. This visualises the vegetations to be the colour it is commonly known to be.

The places where the tops meet create the bright spots and the places where the waves cancel each other out creates the dark spots. Therefore, Young’s experiment showed that light had a wave-like nature.

Examining inside the tiny window of a living eye help us to fully understand the many parts of an eye, and how it functions. Museum of Vision describes how light enters the eye when it bounces off an object creates an image. Only a small amount of image can be seen because the eye has only a tiny window opening. But with the ability to move the eyes, it gives the mind a broader picture. The eyes picks up on the highlighted edges of an object. The light continues to pass through the pupil, making it dilate and the image more focused. Moving towards the back of the eye, a layer that contains cells sensitive to light is called the retina. Cones and rods are cells that sit on the retinas outer layer and absorb distinct bundles of energy. Cones help one perceive color and detail, while rods show black, lights, and whites. Colors make the distinguishing differences in objects when lighting is not enough for the brain. The use of shadows gives one the ability to see 3D.The retina takes that image and makes it appear upside-down and backwards. These lighted cells flip, process the image, and send the information through

The brain receives signals from three different color channels: red, blue, and green. When the brain receives a mix of these signals, we perceive colors that are mixtures of these three primary colors through a process called color addition (Think Quest “Color Psychology”). All colored visible light can be expressed as either mixtures or consistencies of red, blue, or green, which by perception between the eyes and the brain, produces the vast spectrum of color that exists to humans and other organisms alike. With the ability to alter our moods and bodily functions, color has more of an impact on us than we may realize. Each color produces different effects on

When examined, an object and its color, the image identified is a wavelength of light that wasn’t absorbed, alike the other wavelengths, by the object. The beam is then reflected towards the

One bright afternoon, Newton darkened his room and made a hole in his window shutter, allowing just one beam of sunlight to enter the room. He then took a glass prism and placed it in the sunbeam. The result was a spectacular multi-coloured band of light just like a rainbow. The multi-coloured band of light we now know as the ‘colour spectrum’.

Light is referred as an electromagnetic radiation and its nature’s way of transferring energy. Without light, there is no energy and without this energy we would not have the ability to survive. There are many sources of energy but light is one of the most important because it provides energy to all living things here on Earth. The sunlight we get from the sun is absorbed by the earth’s atmosphere which in return is then changed to heat energy. This heat energy is what helps keep our earth warm (sometimes a little too warm for my taste).

The next step to vision is very important, and it is called transduction. Transduction is how light energy is turned into electrical signals that can be interpreted and understood by the brain. Transduction happens primarily in the retina, which is made up of several layers of cells. The first layer that light goes through is made up of rods and cones. Rods are on the outside of the retina and cones make up the center, called the fovea. Rods can only see black and white, while cones can only see color. This was really interesting to me because I did not know that different parts of our eyes interpreted different color light. I thought all light was that same to our eyes, but this is not the case. Since, rods are on the outside of the retina, this means we can see black and white better with of our periphery vision. When light hits our photoreceptors, which are the rods and cones, it activates the photopigment called rhodopsin. It then sends the information to the second layer of cells in the retina called the bipolar cells. The bipolar cells then pass on