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Angiography
Angiography involves injecting a dye directly into the blood and then taking X-rays of the arteries. Angiography of the blood vessels of the heart is called Coronary angiograph..
Physics in relation to Biological science
The optical microscopes developed in physics are extensively used in the study of biological samples. Electron microscope, X-rays and radio isotopes are used widely in medical scienc..
2) Radiation therapy
In this, the cancerous parts of the body are exposed to ionising radiations like x-rays, which kill the cancerous cells. It gives good results in skin, lip, mouth and cervix cancers. Radiation therapy is used in 80% of cancer patients. The basic principle here is to bombard the cancer ce..
Radioactivity
Radioactivity - The discovery of the electron towards the end of the nineteenth century was the starting point of new avenues of research in science, which were to give physicists an insight into the structure and nature of the atoms of matter. In 1896, Henri Becquerel discovered that whe..
k - capture
In some nuclides, the nucleus may capture an electron from the K - shell. The vacancy created is filled by electrons from higher levels giving rise to characteristic X - rays. This process is known as K - electron capture or simply K - capture. An example of k - capture is The n..
In some nuclides, the nucleus may capture an electron from the K - shell. The vacancy created is filled by electrons from higher levels giving rise to characteristic X - rays. This process is known as K - electron capture or simply K - capture. An example of k - capture is The n..Calculation of Density of a Cubic Crystal from its Edge Length
The edge length of a cubic crystal can be obtained from X-ray studies and knowing the crystal structure possessed by it so that the number of particles per unit cell are known, the density of the crystal can be calculate..
Stratosphere
Above the troposphere is the stratosphere. This zone is rich in ozone. Hence, it is also called ozonosphere. In ozonosphere, oxygen in the presence of sunlight converts to ozone by photochemical dissolution. The ozonosphere completely absorbs short wave solar radiations, such as ultraviolet (uv) r..
Structure of the Atom
Structure of the Atom - Summary Atom is the smallest particle of an element, which maintains its identity throughout chemical and physical changes. Atoms are made up of three fundamental particles: electrons, protons and neutrons. Discharge tube experiments by William Crookes and J.J. Thomson led t..
Mechanism
A low-dose x-ray source moves in an arc (360 o ) around a specific part of the body being scanned and repeatedly sends out x-ray beams. As the beams pass through the body, the tissues absorb small amounts of radiation. Once the beam passes through, they are converted by light s..
Ionic Radii
These are radii of ions in ionic crystals. Ionic radius may be defined as the effective distance from the center of nucleus of an ion up to which it has an influence on its electron cloud. In ionic compounds the inter nuclear distance may be taken as equal to the sum of the ionic radii of the..
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