Electromagnetic spectrum

absorb more light at a particular wavelength. Thus, there should be a relationship between the concentration of the compound being studied and its absorbance. This relationship is best determined using a wavelength of light in a region of the visible spectrum where the maximum absorbance is observed. This wavelength is known as λmax and is most sensitive to the changes in concentration. The purpose of this experiment was to study the absorbance of CuSO4. Because copper compounds tend to be blue…

SEM is a kind of microscope to observe the topography of materials. SEM has some advantages: it has a large depth of field and we can observe the 3D image of the sample and analyzing its topography, its magnification range is widely and we could make sample easily because of the X-ray spectrometry, which can determine the elements of sample. When electron beam attack the sample, incident electron will be diffracted and change the direction or even loose some energy. During this process,…

Introduction: The ability of substances within a solution to absorb light is a wonderful phenomenon as it aids in processes such as determining the concentration of proteins. The way that a solution absorbs light is due to the photoelectric effect. The way the photoelectric effect works is that when light comes in contact with the sample, the photons of light will react with its electrons. As the light travels through the solution, "a photon of light may interact with an electron ... [where]…

Astronomy Practical – Carey Zimmer The aim of this experiment is to verify the inverse square law involving the light from the globe of an optics kit (The star) and a light meter placed some distance away. This is to be done by analysing the relationship between the source and the detector. Hypothesis: If the distance between a light source and a light meter increases, then the amount of Lux recorded on the light meter will decrease. Materials: • Light box kit • Power supply • Meter ruler •…

Slow, sleepy, Sunday mornings are the best with you. Your little toasty toes pitter across the floor while you linger closely at my heels babbling in a language only you could ever understand. With my coffee in hand we begin our day. Mundane tasks of laundry and dishes turns into your adventure of, "How much of a mess can I make?" You always seem to be right under my feet and I'm tripping. I'm tripping and falling. Falling -in love- with you. Dearest Daughter, I see myself in you. Today you…

In the first experiment we use the solubility of pigments to distinguish and observe them. Solubility refers to how much of a particular substance can dissolve in a particular solvent. In this experiment we use the solubility of the different colored pigments in the leaf to identify the different pigments. For example, when looking at a normal leaf, you only see that it is green because chlorophyll a and chlorophyll b are the most abundant in green leaves because those chlorophyll’s pigment is…

1. Color Color is a piece of the electromagnetic range and has dependably existed, however Sir Isaac Newton gave the first clarification of shading in 1666. Newton passed slender light emission daylight through a crystal situated in a dim room. Obviously all the noticeable range (red, orange, yellow, green, blue, indigo, and violet) was shown on the white screen. Individuals as of now realized that light went through a crystal would demonstrate a rainbow or noticeable range; however Newton 's…

4. Why PdO/TiON NP powders are chosen as photocatalyst? There are many reasons why PdO/TiON NP powders are chosen as a photocatalyst for MTBE mineralization under visible light. These reasons are listed and discussed as follows: 1- The synergistic effect. 2- The ease of synthesis. 3- The memory effect. 4.1 The synergistic effect Nowadays, modified TiO2 by metal and nitrogen is considered as one of the most promising TiO2 based materials for photocatalytic applications, which is able to…

Abstract In this paper CuO-NH-NH2 nanoparticle was synthesized and used to remove anionic dyes from single and binary systems. The scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), Energy-dispersive X-ray spectroscopy (EDAX) and X-ray diffraction (XRD) were used to characterize the nanoparticle. Direct Red 80 (DR80) and Direct Green 6 (DG6) were used as anionic dyes. The effect of adsorbent dosage, dye concentration and pH on dye removal was evaluated. Kinetic…

Hooge’s relationship is an empirical relationship based on a large collection of data obtained for flicker noise in semiconductors and metal films. According to this model, the PSD of flicker noise is given by, S(f) = γHV 2 Ncf α Where Nc = ncΩ is the number of free charge carriers in the specimen,nc is the charge carrier density and Ω is the volume of specimen.γH is the Hooges constant, a parameter which characterizes the noise levels of a particular system. The initial value of gamma is…