State the applications of radioactivity

      

State the applications of radioactivity

  

Answers


Moraa
Applications of radioactivity

1. Carbon dating – through the identification of carbon-14 and carbon-12 absorbed by dead plants and animals. Scientists can be able to estimate the age of a dead organism. Since carbon is a radioactive element with a half-life of 5,600 years archeologists can be able to estimate the ages of early life through carbon dating.
2. Medicine – radiation is used in the treatment of cancer, by using a radioactive cobalt-60 to kill the malignant tissue. Radiations are used in taking x-ray photographs using cobalt-60. Radiations are used to sterilize surgical instruments in hospitals. Radioactive elements can also be used as tracers in medicine where they determine the efficiency of organisms such as kidneys and thyroid glands. 3. Biology and agriculture – radioactive sources are used to generate different species of plants with new characteristics that can withstand diseases and drought. Insects are sterilized through radiation to prevent the spread of pests and diseases. Potatoes exposed to radiation can be stored for a long time without perishing.
4. Industry – thickness of metal sheets is measured accurately using radiation from radioactive sources. Recently the manufacture of industrial diamonds is undertaken through transmutation.
5. Energy source – in N. America, Europe and Russia nuclear reactors are used to generate electricity. The amount of fuel used is quite small hence an economical way of generating electricity energy as compared to H.E.P generation.

OR

In medicine:
- Gamma rays can be used to control cancerous growths in the human body.

- Gamma rays can be used to sterilize surgical equipment.

- Can be used to monitor blood circulation disorders and the functioning of thyroid gland.

In carbon dating- it uses the ratio of carbon-12 to carbon-14 to estimate the ages of fossils.

Pipe leakages- the content being transported through the pipe is mixed with some radioactive substance which can be detected by a radiation detector on the ground around the area of leakage.

In Agriculture- a radiation detector can be used to monitor the uptake of minerals introduced to plants by mixing it with some weak radioactive substance. Gamma rays can also be used to kill pests or make them sterile,

Determination of thicknesses of thin metal sheets, paper or plastics- a GM tube is used to measure the
thickness of the metal plates, paper or plastic. The source of radiation is placed on one side while the GM tube is placed on the opposite side. The metal plate is passed between the source and the detector. The countrate registered is a measure of the thickness of the metal plate. To be more efficient, a thickness gauge can be adapted which automatically controls the thickness of the metal foils, paper or plastics.
Moraa orina answered the question on April 12, 2018 at 07:32


Next: A radioactive substance has a half life of 10 hours. Calculate the percentage of the sample that remains after 25 hours.
Previous: What is the meaning and the use of IS Null operator in queries?

View More Physics Questions and Answers | Return to Questions Index


Exams With Marking Schemes

Related Questions