Quantum tunnelling

Positronium can be envisioned as an electron-positron pair rotating around their centre of mass, with the counter balance of centrifugal and electrostatic forces. In this situation, the positron and electron lose their identity and the pair is a very light, neutral free radical (3). Positronium has a similar structure like that of a hydrogen atom, except that the proton nucleus is replaced by a positron and it is lighter than hydrogen. It is hydrogen-like, but the reduced mass is mo/2, where mo is

Hertzsprung was born in Frederiksberg, near Copenhagen, on October 8, 1873 and died in Roskilde, Denmark, on October 21, 1967, at the age of  94. His father had a master's degree in astronomy from the University of Copenhagen, but for financial reasons he gave up astronomy to accept a position in the Department of Finances. His father's interest in astronomy and mathematics inspired his interest in the same fields. However, for the same financial reasons, his father did not want his son to pursue

Kinetic energy is produced through motion and heat. It can also be stored. Potential energy is a stored energy that depends on an objects position or their configuration. Potential energy can be converted to kinetic energy. For example a cup on a table has potential energy if you knock the cup off the table, in doing this, the cup changes its potential energy to kinetic energy. Kinetic energy can also be converted to potential energy. An example of this is when you release a spring the potential

A wise man once said “Logic will get you from A to B, imagination will take you everywhere”. That man was Albert Einstein. Einstein was an award winning physicist of the 19th century, and he was famous for his ingenious theories. Albert Einstein was an influential person because of his long and prosperous life, his career as an amazing physicist, and his huge impact on the modern world. Albert Einstein was brilliant from a very young age, but he was not always an award winning physicist, he had

Error Analysis One scientific error was that the classroom lights were turned on while observing the spectral tubes with the spectroscope. The interference of observing the spectral tube with the classroom lights on in the opposite room may have disrupted the observed line spectra. For instance, some of the colored lines observed through the spectroscope, while directed towards the spectral tubes, could have taken into account of the classroom lights. As a result, the sequence of the colored lines

The electrons that are in the atom are stored in energy levels called shells. The lowest energy level must be filled first before the electrons can fill the next shell. The first shell can hold two electrons, the second shell can hold up to eight, while the third shell holds a maximum of eighteen electrons. The outermost shell hold what are called valence electrons. When an atom’s outermost shell is complete, it will be stable, while when the shell is incomplete the atom is reactive. To be a stable

Quantum dots (QDs) also known as, semiconductor nanocrystals which are bright, photo stable flurophores that have a broad excitation spectrum but a narrow Gaussian emission at wavelengths controllable by the size of the material. It can be synthesized in many ways like Epitaxial growth modes such as Vander Merve, Volmer-Weber, and Stranski-Krastanow are layer by layer methods of synthesizing quantum dots on a crystal substrate. Newer methods used to produce colloidal quantum dots give better control

Quantum Mechanics The Quantum Mechanics are weird, yet incredibly powerful theory of the subatomic world, in which everyday concepts to do with the forces and motion are seen in a different perspective, as they do not longer apply in the same way. This calls for a new type of mechanics based on what scientists call "quantum" rules. Quantum mechanics are a very complicated matter that scientists don't fully understand yet; they are in charge of studying the smallest faces of our world. The idea

To become a scientist is not an easy path. You start from zero and have to start making people believe in you. That is one of the hardest task you have to do as a scientist but along come other task. You have to go through a lot of experiments and trial and error. People may start believing your thoughts and equations. The fact that they believe them does not make you a scientist until you can prove your theory. Albert Einstein for decades had the best thoughts but was not consider a scientist until

(1) How do the films discussed link the concepts of ‚crime’ and ‚travelling’? What makes travelling such an interesting phenomenon within the crime genre? Please also refer to the narrative structure of crime films. Travelling has used to be an activity that entirely differs from our everyday life, an escape in order to find authenticity. Travelling forces people from their comfort zones and lead to new emotions, new actions, new perceptions, acquired through the prism of another reality. For a long