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Refraction and Reflection of Light
IO incident ray OR l reflected ray OR refracted ray The diagram shows how the light gets refracted when it is traveling from one optical medium to another. Like reflection, refraction of light takes place according to certain laws. Before we state these laws let us get..
Computed Tomography
Computed Tomography - In conventional X-rays an overlap of organs occurs and often difficult to interpret. These diagnostic difficulties have been eliminated by the use of an X-ray technique called computer Tomography (CT) scaning or computerised Axial Tomography (CAT)..
Discovery of Radioactivity and Nature of Radiations
>Three types of radiation from recognized radioactive elements are a -particles, b -particles and g -radiation. It was realized that radioactivity of an element is independent of its physical state, its chemical environment or temperature, suggesting that it is a property of the nucleus i.e., a nuc..
Summary
. It is abbreviated Z. Mass number is defined as the sum of the number of protons and neutrons in the nucleus of the atom. It is denoted by 'A'. Atoms of the same element having same atomic number but different mass numbers are called isotopes. Isotopes show similar chemical properties but the phys..
Structure of Atom Summary
. It is abbreviated Z. Mass number is defined as the sum of the number of protons and neutrons in the nucleus of the atom. It is denoted by 'A'. Atoms of the same element having same atomic number but different mass numbers are called isotopes. Isotopes show similar chemical properties but the phys..
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..
Natural Systems of Angiosperm Classification
The natural systems of classification of angiosperms have mainly used the floral characteristics as the basis. Some of the earlier attempts in this direction were those of Linnaeus, John Ray, Bentham and Hooker. However, these systems of classification are now termed as no..
Applications
(i) Radioactive dating This gives us an approximate age of the rock or material containing the radioactive atoms. For e.g., A measurement of a fraction of uranium atom which have decayed into lead (by knowing the half life of uranium) tells us how old the rock is. (ii) Radiation from space conve..
Application of Plane Mirrors - Periscope
Application of Plane Mirrors - Periscope - It is an instrument in which plane mirrors are used to fold light so that the image of an object can be brought down to a lower level. It is used for observing enemy movements from trenches without any danger of being seen. Sailors on s..
Application of Plane Mirrors - Periscope - It is an instrument in which plane mirrors are used to fold light so that the image of an object can be brought down to a lower level. It is used for observing enemy movements from trenches without any danger of being seen. Sailors on s..Colorimetry
It is a technique used for measuring the density of a coloured substance in a solution. The instrument used is called colorimeter. Here, monochromatic filters are used and light rays of specific bands of wavelength are passed through the solution. Any compoun..
It is a technique used for measuring the density of a coloured substance in a solution. The instrument used is called colorimeter. Here, monochromatic filters are used and light rays of specific bands of wavelength are passed through the solution. Any compoun..See what our Users say :
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