Essays on Grating

Introduction

Spectrophotometry is one of the most common and efficient means of chemical analysis currently used in estimating the concentration of some chemicals. The technique exploits the radiation absorption property of various chemical substances in determining their concentrations. Spectrophotometry is based on Beer-Lambert Law. Beer-Lambert Law is the linear relationship between the absorbance and concentration of an absorbing species (Nair, 2010; Burrows et al., 2013). The mathematical expression of Beer-Lambert Law is shown in equation1 below: A=aλ*b*c Equation 1 In the equation 1 shown above, A represents the measured absorbance, a is the absorptivity coefficient which depends on ...

Q1 The independent variable was the color information while the dependent variable was attention attraction. Both variables are of nominal level, i.e. the variation of color information or attraction of attention does not vary upon the change of the color or the person to whom they attract attention. Q2 The research was subjective, especially in treating RTs (reaction times) above 1500 ms as misses and 300 ms as anticipatory. There is no proper control or a basis upon which the researcher sets this criterion of exclusion. Besides, there is no background check of the participant to analyze if they ...

Spectroscopy is the scientific technique that is used to measure the movement of light, whether it is emitted, absorbed, or scattered because of certain materials (Wiggins). These materials can be studied using this technique. Spectrometers are the devices that make this process possible. These devices break light into its spectral components and transform them into functions of wavelength or signals in order for us to observe and to analyze them in our computers (B&W Tek). Since light can be broken down into several parts, these spectrometers act like a prism wherein it differentiates each color from one another. With ...

Electronic spectroscopy is divided into two: Ultraviolet and Spectroscopy. Electronic spectroscopy is the earliest method of molecular spectroscopy and includes a phenomenon of interaction of molecules with ultra violet lights and visible lights. Absorption of photo results on electronic transition of molecules and electrons are promoted form ground state to higher electronic states. In the display of strata, spectra take the forms of horizontal scales, vertical scales, Ultra violet rays, and ORD. All the scales taken use wavelengths. Electronic spectra originated from the absorption of light photons by molecule results in electronic excitation of molecules with chromospheres. The electronic transition ...