Electromagnetic radiation

Answer: Question 1 (a) Energy Energy Energy Band gap Band gap 0 0 0 (i) Insulator (ii) Semiconductor (iii) Conductor Diagram 1: The energy band The differences between insulator, semiconductor and conductor. Insulator Semiconductor Conductor It has a large band…

The visible pulse (gating pulse) enters the microscope, and together with the ultrafast electron pulses illuminate the nanostructure specimen (gold nanoparticle). The visible laser pulse kept at low power (~1.8 mJ/cm2) to avoid saturation. At the spatiotemporal overlapping, the coupling between the visible and electron pulses takes place. The signature of this coupling can be revealed by measuring the electron energy spectrum using the electron energy spectrometer attached to the microscope. The…

2.4.3. Dispersion of Light The fact that the refractive index different for each wavelength of light produces an effect called dispersion. This can be seen by shining a beam of white light into a triangular prism of glass. White light entering a prism is refracted in the prism at different angles depending on the wavelength of light. The refractive index for the longer wavelengths (red) is lower than for the shorter wavelength (violet). This leads to a large angle of refraction for the longer…

The development of simple methods for generating molecular complexity with defined stereochemistry from easily accessible starting materials became significant and fascinating over last few decades. A simple methoxyphenol is found to be most appropriate precursor for generating wide range of complex cyclic and acyclic architectures. Several chemical1-5 and electrochemical methods6 have been used for the umpolung of electron-rich nucleophilic 2-methoxyphenols and 4-methoxyphenols to electrophilic…

The Radio is one of the most important means of communication that has affected nearly every single person on the planet. The radio can transmit messages from all over the world in an instant so that a person can listen to what is on it. The history of this device began in the 1800's and continued being developed and improved on as time went by, which was created by different inventors and became the radio as people know it today. Heinrich Hertz discovered radio waves in 1887. The waves moved…

What is a RIN A Renewable Identification Number (RIN) is a serial number assigned to biofuel batches used to track its production, use, and trading activity. RINs are required by the United States Environmental Protection Agency under the Renewable Fuel Standard (RFS) program. RINs are credits used for compliance, and are the currency of the RFS program. The RFS program is an initiative created by Congress to reduce the emissions of greenhouse gases in efforts to expand the nations renewable…

When looking at a flashlight, it can be determined that the flashlight itself resembles a parabola. Flashlights are supposed to be able to focus on a single point, which is infinitely small. Since a flashlight is supposed to mirror a parabola, the flashlight has similar components as a parabola. The filament, which is the part of the flashlight that gives light, resembles the focus on a parabola. The filament is a three dimensional object so it is infinitely larger than a point, yet the filament…

Much of the ocean has still been unexplored, but the parts that we have explored have allowed us to see something nearly unbelievable for the first time: fish that naturally light up! In fact, many different types of creatures that live in the water light up: squid, eel, jellyfish, which can be seen to the right in figure one, and many various species of fish have the ability to do such. The ability, called bioluminescence, is defined as “ the emission of light from living organisms”, according…

During the microscope lab, my partner and I learned how to properly use a microscope, calculate the field of view, and view and prepare slides. Microscopes are instruments used to view very small objects that cannot be seen with the naked eye. We found that microscopes have many different parts to them, including the diaphragm, ocular lens, and objective lenses. There are three powers of magnification, scanning power (4x), low power (10x), and high power (40x). To find the total magnification,…

Scientists have the ability to determine the molarity and the contents of a substance by measuring the intensity of the light that is emitted through the solution. Scientists accomplish this by using the technique of spectroscopy; spectroscopy can be defined as the science affiliated with the spectra produced when matter interacts with light. Lab 7 investigation 19, “What Factors Affect the Intensity of Color?” expands on the process of spectroscopy, and its relation to the molarity of a…