1. Radiation effects on humans.
2. Radiation affects our health (includes teeth, skin, brain, oral mucosa, eyes, heart).
3. Ultraviolet radiation causes human viral infections.
4. Radiation effects on biota.
5. Radiation effects on birds.
6. Radiation effects on plants.
7. Radiation effects on the environment.
8. Radiation affects viruses in marine ecosystems.
9. Radiation effects cause pollution.
• The energy of the radiation emits.
• Its activity how often it emits radiation.
• Whether the disclosure is external or internal.
• The rate at which the body metabolizes
• Where the radionuclide gets concentrated and the duration it stays in the body.
Question 1: When 15P30 decays to become 14Si30, what will be the particle released?
Solution: The reaction which occurs when
15P30 decays to become 14Si30 is 15P30 -> + 1e0 + 14Si30
Hence, it is clear that the particle that is released is (D) positron.
Question 2: A radioactive isotope having a half-life of 3days was received after 9days. It was found that there were only 4gms of the isotope in the container. What was the initial weight of the isotope when packed.
Solution: Half life = 3days
Let initial amount in the container = x
Fraction of amount left after 3 g=half lives, (1/2)3 = 1/8
So, (1/8)of x = 4gms
ð X = 32gms.
People are more responsible for the emission of radiation than smartphones. Inside the Chernobyl, reactors grow a type of fungus that thrives on radiation. Cosmic radiation from space is consistently hitting the earth. Some smoke detectors use a small amount of radioactive material to detect smoke. Radon is a radioactive gas you can not see, smell, or taste, but it may be a problem in your home or school.
1. How Do Radioactivity and Radiation Differ?
Radioactive materials are the form of atoms that have stored energy and may disintegrate in the future, releasing radiation whereas radiation is the result of a nuclear disintegration in the form of radiant particles or rays. Radioactivity is the process through which certain elements release radiation, whereas radiation is the energetic particles which are released by radioactive elements. Radioactivity occurs with the decay of specific unstable atomic nuclei whereas the general term for any energy that radiates outward in all directions. Radioactivity is the property of radionuclides of spontaneously emitting ionizing radiation, whereas radiation is the process of issuing energy as waves or particles, and the radiated energy.
2. What are the Symptoms of Radiation Sickness?
The severity of symptoms and illness or acute radiation sickness depends on the type and amount of radiation, which body part was exposed and how long you were exposed. Symptoms may include weakness, fatigues, fainting, bleeding from nose or mouth, hair loss, dehydration, skin burns, diarrhoea, fever, inflammation of exposed areas like redness, tenderness or swelling. The earliest symptoms of radiation are nausea, vomiting, and diarrhoea. They may not stay stable for several days. It can come and go, but it will happen to the next moment of exposure. Then comes the latent stage, and eventually coma and death are inevitable within 3days.