Ultraviolet Light Lab

1. Place a small amount of wax from a birthday candle into a test tube. Heat gently over a burner flame until the wax melts completely; then allow

Every cell transports materials in and out throught something called a membrane. There are many different methods of transport in the cell Saccharomyces cerevisiae (Serrano, 1977) We want to know does adding higher concentrations of azide more effectively block dye transport? We tested the transport of dye in yeast cells with a metabolic inhibitor. When we did this we showed no difference in the absorbance between different azide solutions, and our control. From this we concluded that azide has no effect on the transport through a yeast cell membrane.

Ultraviolet (UV) radiation is present in normal sunlight and sunlamps. “The sun emits energy over a broad spectrum of wavelengths: visible light that [one] can see, infrared radiation that [one] feels as heat, and ultraviolet (UV) radiation that [one] cannot see or feel. UV radiation has a shorter wavelength and higher energy than visible light. It affects human health both positively and negatively” (U.S. EPA). There are multiple types of ultraviolet radiation known to scientists and each affects human in different ways. “The longer ultraviolet rays (UVA), which penetrate deep into the skin, are responsible for tanning. Shorter rays (UVB) damage superficial skin cell layers, causing sunburn” (Harvard). Medical researchers at the Skin Cancer Foundation found that “the cumulative damage caused by UV radiation can lead to premature skin aging (wrinkles, lax skin, brown spots, and more), as well as skin cancer” (Skin Cancer Foundation).

Infrared is often emitted by the Sun and reaches Earth in the form of infrared radiation. Not only is infrared radiation critical to sustaining lives on Earth, but it’s also widely used for various applications, including medical and communication. Its heating property allows for treatment of chronic illnesses, such as high blood pressure and rheumatoid arthritis. Ultraviolet waves are categorized in three different classifications: UV-A, UV-B and UV-C. Despite its harmfulness, 95% of harmful UV lights can be absorbed by Earth’s atmosphere. In addition, UV lights have found many useful applications, such as verifying the authenticity of a document, detecting counterfeit bills, investigating illegal dumping by detecting the presence of

Description of Experiment/Investigation Purpose: The purpose of this lab was to be able to see the various ways that light interacts with different surfaces. The lab shows how incident light rays can be absorbed, reflected, and refracted based upon the object with which it comes in contact. Description of the Use of Materials: For this lab, a flashlight was needed to represent a beam of incident light and to test how the beam coming from the flashlight interacted with various materials. In addition, the room had to be dark for optimal results in seeing the incident light. To test the reaction of the light with various objects: a comb, a white piece of paper, a triangular prism, a CD, powder, mirror, wax paper, tissue paper, glass of water,

Ultraviolet light is present in sunlight. Generally the wavelengths are too short to be seen in the visible spectrum, it is present in sunlight, tanning beds, and black lights. (Lynch and Livingston, 2001) Earth’s atmosphere blocks

The heat of light lab is used to test the temperature of the shades of light in order to understand whether the different shades have different temperatures. As for the purpose of figuring out whether the different shades of light have different temperatures there are many. One of which is so you can determine what temperature is ideal for household items like lightbulbs, or when taking photos. In addition another reason for this lab was to introduce concepts of light in order to have a better understanding of it. Though pertaining to experience this lab was used to introduce students to the lab process, and the tools needed for labs.

Ultraviolet radiation is invisible rays that are part of the energy that comes from the sun. For example; Ultraviolet radiation can burn the skin, such as a sunburn and cause skin cancer (Medicinenet). The ozone layer is a layer of ozone (a colorless unstable toxic gas) in the upper atmosphere that prevents dangerous radiation from the Sun from reaching the surface of the Earth (Merriam-Webster). In correlation of the two together, we need the ozone layer to protect or animals and our plants from the ultraviolet radiation. Without the ozone layer being there it could damage the immune system to animals and humans, leaving many with skin cancer and eye cataracts (eco-action). The ozone layer is also important because it will have a negative

The information from the experiment could be useful in fields that study things based on light. Fields like in astronomy see that the light that they receive might be distorted a lot based on the temperatures of liquids in spaces. This could be useful because stuff like asteroids could have liquids that might reflect some light making it hard to detect. Also, light coming from other plants as the planet can distort light a lot due to atmosphere containing different temperatures. Though this experiment only tested light refraction from liquids there could be another experiment that could test if this priority of light could be used on other mediums like air. This could be helpful in the matter of refraction on other planets.

UVB stands for Ultraviolet B. These rays penetrate the upper layers of the skin known as the epidermis and cause the skin to burn. UVA stands for Ultraviolet A. These rays penetrate deeper through the epidermis into the lower layers of skin known as the dermis.

UV Electromagnetic waves are shorter in wavelength and higher in energy than visible light. They fall outside of the visible light spectrum, and the human eye cannot see them. Even though you can’t see them, doesn’t mean they can’t hurt you. When your skin is exposed to the UV rays, the ultraviolet rays generate free radicals and can also directly damage your DNA. After the uv rays strike your skin, the short term damage is creating a painful burning sensation, and the long term damage is aging of the skin. The UV rays that humans are exposed to on the earth’s surface consist of, UVA and UVB electromagnetic waves. The UVB waves have a shorter wavelength, and don’t puncture, penetrate or seep deeply into the skin. The UVB waves cause significant

The cryosphere consists of all frozen water on earth. It is found in the high northern and southern latitudes of the planet. The components of the cryosphere include the following: sea ice, glaciers, ice sheets, ice shelves, snow cover, freshwater ice, and frozen groundwater. The cryosphere plays an important role in cooling the planet. The cryosphere, being ice, has a high albedo. The accepted albedo of ice in the cryosphere is .6 or 60%, meaning ice reflects 60% of incoming shortwave radiation. It is important that the cryosphere has a high albedo because it helps the planet to absorb less coming radiation, thus helping to cool the atmosphere. Surfaces such as the open ocean or asphalt roads have a lower albedo; these surfaces absorb more incoming radiation and

UV radiation is an electromagnetic radiation that reaches the earth from the sun. It is classified into UVA, UVB and UVC according to their wavelength. UVC is usually absorbed by the ozone layer not penetrating to earth while UVA and UVB penetrate the ozone layer and play an important role in skin photo aging, sun burns and skin cancer. Most of the UVB IS filtered by the atmosphere. UVB can only cause damage to the epidermal layers as it cannot perpetrate beyond the superficial skin layers. UVB is responsible chiefly for skins reddening

Research Question: What is the effect of concentration on the intensity of fluorescence in turmeric powder?

It has been proven that the Earth’s atmosphere blocks 98.7 percent of the sun’s UV rays. The other 2.3 percent that we are exposed to, have both beneficial and harmful effects. We do need to focus on the benefits, because we have way more of them. The only harm it does to our body is skin cancer, which by being more careful we can protect from. The