Quantum efficiency

Like any regular person, Danny hated colds. He used to get them all the time before the accident, at least six to eight times a year. Jazz suggested that it was probably a weakened immune system do to too much exposure from his parents' ectoplasmic experiments from a young age. Ironically, it was one of their experiments that ultimately strengthened his immune system from any kind of cold or common sickness. Or so he had thought. Apparently, while he was resistant to most human diseases, he…

Light is an electromagnetic radiation that can be detected by humans. Electromagnetic radiation happens in an extremely large range of wavelengths from gamma rays to radio waves. Within that spectrum the wavelengths visible to humans are few. Light is very difficult to define, in the sense that scientist have been arguing weather light is a particle or a wave. Many experiments have been done to proof weather light is a particle or a wave. The truth is that light sometimes acts as a wave and…

Rebecca McKenney Astronomy 101 Mrs. Alburg 25 March 2017 Chapter 2 Review Questions 1. For each of the following wavelength, state whether it is in the radio, microwave, infrared, visible, ultraviolet, X-Ray, or gamma portion of the electromagnetic spectrum and explain your answer. (Page 37 – 38) Original Number Nanometer (nm) Micrometer (μm) Millimeter (mm) Centimeter (cm) Meter (m) Kilometers (km) Angstrom (Å) 2.6 μm 2,600 2.6 0.0026 0.00026 0.0000026 0.0000000000026 26,000 34 m…

The purpose of this spectroscopy experiment was to determine if the spectra matched the electronic transitions that occur in the hydrogen atom among several other atoms. We used the Bohr model of atomic structure to determine the orbit numbers that correspond with the spectrum emitted by the hydrogen atom. The Bohr model states that electrons will never be found in between states, but rather completely in one state or the other. We used this model to determine the initial n value at which the…

Swap the tights for a $3000 suit and the Batmobile for an Aston Martin, and voila, you’ve got yourself a hero! However, James Bond, being the egotistical character that he is, isn’t quite as merciful and emotionally driven as our everyday heroes, which makes us wonder, is Bond a hero… or not? 2006 film Casino Royale directed by Martin Campbell, is the first of the James Bond movies to star Daniel Craig as 007. Armed with a Walther PPK and a license to kill, Bond sets out on a daring mission to…

No one would have believed, in the last years of the 19th century, that physics was heading for a crisis. It seemed like all the large questions had been answered. The behaviour of bodies, from asteroids to galaxies, was predicted by Sir Isaac Newton 's laws of gravity and motion. Magnetism, electricity and light were linked by James Clerk Maxwell’s Equations. The understanding of the atom had reached the plum pudding stage, where an atom was a globe of 'stuff ' with the positive and negative…

The purpose of this spectroscopy, atomic spectra, and light lab was to further your understanding of how different gases are given specific wavelengths based on the variety of color that their light gives off. (Grossie, 285). Every ion gives off a different light configuration based on the amount of energy they hold. (Grossie, 285). A spectroscope is used to break down the light given off by the gas into different colored lines in different areas on the scope. The measure of these lines is what…

Supplemental information for “Colloidal Type-II CdS/ZnSe NCs : Synthesis, Electronic Structures, and Spectroscopic Properties” S.A. Ivanov, A. Piryatinski, J. Nanda, S. Tretiak, D. Werder, V. I. Klimov Theoretical model. To describe quantum states in a spherically symmetric Type-II core/shell nanocrystals (NC) characterized by the core radius R and the shell width H, we use effective mass approximation. We assume the existence of single energy bands for both electrons and holes. This assumption…

Created in 1981 by Hilary Putnam the Brain in a Vat theory is about a science fiction possibility of our brains quite literally being in a vat. Hilary Putnam uses referencing or representation, the Turing Test, the rules of language and a host of examples to establish that the statement “we are brains in a vat” is a self-refuting statement. He asks the question “Could we, if we were brains in a vat in this way, say or think that we were?” (Putnam 1981, p7) and comes to the conclusion that we…

Electron microscope (Manning, n.d.) is the instrument used to magnify different scientific artifacts with the used of electron beams to create the illustration of the sample, and has the capacity to magnify two million times of the original specimen. The development of the electron microscope was first known in the year 1931 because Ernst Ruska and Maximoll Knoll magnified electron image successfully, but the equipment was actually constructed in 1933 (Innes, n.d.). The concept of the electron…