Photon

HR Diagrams The Hertzsprung-Russell Diagram, otherwise known as HR diagram, is a graph that shows many patterns and properties of stars based on plotting them by their temperature on the surface and their light they emit, or luminosity. Created in 1912, the HR diagram was made by two astronomers, Ejnar Hertzsprung and Henry Russell who found patterns with stars’ properties. The Hertzsprung-Russell Diagram shows how every star goes through different evolutionary stages. These evolutionary stages…

is a poisonous crystalline acidic that presents itself as tars of coal and in wood. In dilute solution it is use as an disinfectant. When the peroxy acid ester and phenol mix it releases energy that excites atoms in the fluorescent dye and causing photons which are released particles of light. Glow sticks has two counters. An outer container and inner container that each chemical is separated in. The chemicals are separated from each other in two containers from the glow stick until the inner…

History of Atomic Absorption Spectroscopy (AAS) Atomic Absorption Spectroscopy (AAS) was first proposed by Alan Walsh, later known as Sir Alan in 1955. Sir Alan worked in Melbourne for the Commonwealth Scientific and Industrial Research Organization (C.S.I.R.O.). This concept came to Alan Walsh in a flash of inspiration as he was gardening at his Melbourne home. This led to the invention that has since been labelled as one of the most significant achievements in chemical analysis for last…

Plants change the sunlight's energy into chemical energy by the process of photosynthesis. Pigments in the plants called chlorophyll, absorb photons from the sun. Glucose is the main source nutrition in plants. Two reactions happen in the Photosynthesis that are the light reactions, also known as light dependent reactions, and dark reactions, also known as light independent reactions. The dark…

in dilute sodium hydroxide solution with high chemical and radiochemical purity. Its radioactive concentration lies at 4 to 11 GBq/ml. Cyclotron produced radioiodines Iodine-123 represents widely used cyclotron-produced radioisotope for single-photon emission computed tomography (SPECT). Nuclear reaction which yields Iodine-123 directly via proton bombardment of tellurium targets in a cyclotron with subsequent separation of this radioiodine from the irradiated target represents most commonly…

The ultimate space book By Nathan Deline The ultimate space book The big bang 1. The big bang happened 13.8 million years ago 2. The big bang is the rapid expansion of matter from a state of extremely high density and temperature that according to current cosmological theories marked the origin of the universe. 3. This is the red shift the displacement of spectral lines toward longer wavelengths (the red end of the spectrum) in radiation from distant galaxies and celestial objects. This…

Visual Prosthesis: Selling a Dream to Visually Impaired (A literature review of advancements in the field of Visual Prosthesis) Abstract Visual prosthesis is by far the best bet to restore vision in a patient suffering with visual loss. This paper provides a literature review of the various technological advancements made over time and how these advancements have proved noteworthy in fields of visual prosthesis. To develop a basic understanding about the visual prosthesis, the anatomy and…

CYGNUS One of the most prominent constellations in the night sky, and one of the most involved and eventful regions of space, the Cygnus constellation and its surrounds are fascinating, and a worthwhile talking point for many a topic. Occupying an area of 804 square degrees, Cygnus is the 16th largest constellation in the night sky; it lies in the fourth quadrant of the northern hemisphere, with right ascension at 20.62, and declination at +42.03: in other words, if you were in the northern…

Metal electrodeposition is the process of reduction reaction and crystallization of metal ions in an electrolytic cell according to the mechanism of electrolysis. Electrodeposition is one of the main methods for improving and enhancing the metal substrate property. Now, in order to overcome the defect of single electrodeposition with shortcomings of cracks, pores, pits, pocking and so on, the modern new techniques sprang up such as jet electrodeposition [1], ultrasonic vibration assisted…

Similarities between Lasers and IPLs In both Lasers and IPLs, the basic principle is the absorption of photons by chromophore within the skin and the transfer of energy to these chromophore. A chromophore a part of a molecule that is important for color. A specific range of visible light that hits a specific chromophore is absorbed by exciting an electron…