uses of gamma rays

Mutations are defined as heritable changes in structure number of genes or chromosomes. Mutations can be natural (spontaneous) or induced. Many natural mutations are recorded. But, stability of mutant expression needs a thorough testing over generations, as many mutants have tendency to revert to n..

Mutation Breeding - Mutations are defined as heritable changes in structure number of genes or chromosomes. Mutations can be natural (spontaneous) or induced. Many natural mutations are recorded. But, stability of mutant expression needs a thorough testing over generations, as many mutants have ten..

Production of cathode rays - In 1885, Sir William Crookes carried out a series of investigations into the behaviour of metals heated in a vacuum. The experiment of Crookes and others showed that a heated cathode produced a stream of radiation, which could cause gases at low pressure to gl..

>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..

> kilometers from the earth. Sun's light travels at a great speed of 3x10 5 kilometers per second, and takes about 8 minutes to reach us. Light takes about 4.3 years to reach us from the next nearest star called Alpha Centauri. The sun is a mass of hot gases, about 109 times bigger in size than the..

> kilometers from the earth. Sun's light travels at a great speed of 3x10 5 kilometers per second, and takes about 8 minutes to reach us. Light takes about 4.3 years to reach us from the next nearest star called Alpha Centauri. The sun is a mass of hot gases, about 109 times bigger in size than the..

The mass of each β - particle is negligible. It has no mass. 4. Its velocity is less 10 7 cm/s. Its velocity is less than the velocity of light and is equal to 2.7 x 10 8 m/s Its velocity is the same as that of light and is equal to 3x10 8 m/s, 5. Its has maximum ioni..

. This zone is called troposphere. Therefore, at higher altitudes, some of us find it difficult to breathe. Above the troposphere is the stratosphere. This zone is rich in ozone. Hence, it is also called ozonosphere. In ozonosphere, the sunlight converts oxygen to ozone by photochemical dissolution..

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 submarines use periscopes to see t..

Cancer is only curable in the initial stages. There are two types of therapies involved for cancer, radiation therapy and chemotherapy. Radiation therapy involves using powerful light rays to burn the cancerous tissue. Chemotherapy also destroys the cancerous tissue selectively..