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Explain Radioactivity and its Problems and Applications?All radiation, electromagnetic as well as the kind from nuclear decay, takes its toll on living organisms. If the radiation has enough energy it can disrupt the functioning of living cells. This is particularly harmful if the radiation damages the nucleic acid molecules which make up your genetic information. We are constantly being exposed to radiation from natural sources. Rocks contain radioactive elements, we are being bombarded by cosmic rays from space and our food and water contain radioactive particles. Additional amounts of radiation come from man-made sources such as testing from nuclear weapons, medical x-rays and nuclear power plants. All three types of radiation come in a variety of different energies, but we can make generalizations. Alpha particles are the least penetrating (they can be blocked by a t-shirt) but because of their large mass, they are the most harmful if they actually get into your system. Gamma rays are the most penetrating and require several centimeters of lead to stop them. Beta particles are somewhere in between. They can be stopped by aluminum foil. Using Radioactive Nuclides: Radioactive elements are easily found because they emit radiation. They can be used as tracers to show what is happening in plants and animals. A radioactive isotope of a molecule can be substituted for the regular atom used by a specific organ in your body. Doctors can follow the path of that tracer by detecting the movement as it wanders through your body. Areas of high or low radioactivity signal a problem area. Radioactive isotopes can also be used to target cancer cells. If you have a thyroid cancer doctors will often prescribe iodine-131.The iodine accumulates in the gland and the radiation destroys the cancer cells. For other types of cancer, external sources of radiation bombard the cancerous cells to destroy themSome naturally occurring nuclides can be used in archeological and geological dating. We already mentioned these applications in the section entitled Radioactive Dating.
N-Type Substances: When a small quantity of Arsenic or Phosphorous (group VA elements) is added to silicon or Germanium, it becomes good conductor of negative charges, such a s
Define the function f(x)=2x/1-x^2. Find the number of distinct real solutions of the equation f^(5)(x)=x. Details and assumptions f^(n)(x) denotes the function f applied n times. I
Scientific principle behind a laser: The basic scientific principle behind a laser was first put forward by Dr. Charles H. Towns in 1954 which later led to the development
How is magnification in scanning electron microscope controlled? Magnification in scanning electron microscope: Magnification into a SEM (scanning electron microscope) can b
Explain the formation of diffraction pattern due to plane transmission grating. Describe the meaning of missing spectra in the diffraction pattern.
The Voltage Control A voltage controller, also known as an AC voltage controller or AC regulator is an electronic module which is based on either thyristors, SCRs, TRIACs or IG
The force acting between two point charges can be computed using which of the following laws? a) Ohm's Law b) Ampere's Law c) Coulomb's Law d) Newton's Second L
Illustrate the mechanism of piezoelectric effect? Mechanism of Piezoelectric effect: Piezoelectric and inverse piezoelectric consequences are only exhibited through certain
construction of nand gate?
Explain Simple Harmonic Motion Many repeating motion problems can be solved by taking the displacement as where d is distance in meters, A is amplitude in meters,
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