Wavelength

“Every living thing on the surface of the planet has a system to synchronize [itself] with day and night” (Barone 8). Sleep is a natural part of life and most people, at some point in their life, experiences difficulty sleeping. Today, however, sleep disruption is becoming a more prominent issue due to the rising number of electronic devices. Because of the blue light illuminance these devices produce, the brain’s secretion of the sleep-inducing chemical melatonin is disrupted; therefore,…

the presence of one wavelength light, or hue of colors, on the key. After skill acquisition, they tested the amount of responding to other key colors gradients. Ten wavelengths ranged from blue-green to yellow. When presented with a color that was not very similar to the initial stimulus, responding decreased. When color was similar to the initial stimulus, responding increased. Guttman and Kalish reported that pigeons were unable to thoroughly discriminate between wavelengths. The Guttman and…

The purpose of this experiment was to determine the correlation of light intensity and wavelength on white light, no light, red light and green light color treatments when looking at spinach. The same spinach plant was tested under different light environments (no light, white light, red light and green light). A control cuvette was used to compare the rate of photosynthesis to those of the color transmittance cuvette. Before collecting the data we learned about plants and light absorption. We…

works on the same principal as laser. The main difference between IPL and conventional lasers is that IPL can deliver a wider variety of wavelengths, instead of just one. This results into a more targeted procedure that can easily remove hair from different areas of the body. The majority of IPL system have a set of filters that can be applied to alter the wavelength of the light. This leads to better penetration in certain areas, without having to use excessive energy levels which would…

TIME Magazine named the PET scan the medical invention of the year in 2000, and Dr. David Townsend and Dr. Ronald Nutt are credited as the individuals behind the paramount device. A positron emission tomography (PET) scan is a nuclear medicine imaging test that aids in revealing how well a human’s organs and tissues are functioning; the scan can measure an individual’s oxygen use, glucose metabolism, blood flow and much more. The significance of this function is monumental as it essentially…

Most people know that heat moves from hot objects to cold objects, but do they know how that heat is transferred? There are only three ways that heat can be transferred: conduction, convection, and radiation. Today I will endeavor to inform the reader on how these three different methods of heat transfer work and provide examples of where they occur in the real world. The most prevalent, and most commonly recognized, form of heat transfer is conduction. Conduction is the transfer of heat…

concentration of the dyes present in the green apple Gatorade, a spectrometer was used to measure the wavelengths and absorbance values for the given dyes. A sample of the green apple Gatorade was tested in the spectrometer to measure its absorption and compare the values collected to stock dyes provided in lab. The data displayed that the green apple Gatorade contained blue-1 food dye because the Gatorade’s wavelength at peak one was 422.3 Nm, and blue-1 food dye’s peak one was 423.7+-.1.5…

photosynthetic activity. When it comes to photosynthesis, three factors limit the rate of photosynthesis, temperature, light intensity, and CO2. In this lab, the rate of photosynthesis is tested against different light intensities as well as different wavelengths of…

8.Please explain, what other wavelengths of electromagnetic radiation are used in medicine? Phototherapy, the controlled exposure to sunlight or ultraviolet light source, is used often in medicine for a number of reasons. For example, exposing the infant to ultraviolet rays or sunlight helps a jaundiced infant break down excess bilirubin or bile. Ultraviolet light has wavelengths in the 10 to 400 nm range (between visible light and X-rays in the spectrum)…

If an object reflect entire visible wavelength region then it is white. If some region of this light are absorbed and other part is reflect then object is colour. Black surface absorb all the visible region and nothing reflect. IR reflective inorganic colours pigments reflect wavelength in IR region with reflect the some portion of visible region. Abosrptivity and reflectivity are independent with each other…