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What do scientist mean by radiation?
In physics, radiation is a process in which energetic particles or energy or waves travel through a medium or space. There are two distinct types of radiation; ionizing and non-ionizing. The word radiation is commonly used in reference to ionizing radiation only (i.e., having sufficient energy to ionize an atom), but it may also refer to non-ionizing radiation (e.g., radio waves, heat orvisible light). The energy radiates (i.e., travels outward in straight lines in all directions) from its source. This geometry naturally leads to a system of measurements and physical units that are equally applicable to all types of radiation. Both ionizing and non-ionizing radiation can be harmful to organisms and can result in changes to the natural environment.
What is meant by ionising radiation?
See the Wikipedia article 'Ionising Radiation' of which this is the introduction. Ionizing radiation consists of subatomic particles or waves that are energetic enough to detach (ionize) electrons from atoms or molecules. Ionizing ability depends on the energy of the impinging individual particles or waves, and not on their number. A large flood of particles or waves will not cause ionization if these particles or waves do not carry enough energy to be ionizing. Examples of ionizing particles are energetic alpha particles, beta particles, and neutrons. The ability of electromagnetic waves (photons) to ionize an atom or molecule depends on their wavelength. Radiation on the short wavelength end of the electromagnetic spectrum - ultraviolet, x-rays, and gamma rays - is ionizing.
Can you List three types of radiation in order of increasing ionizing ability?
Alpha particles have the lowest ionizing ability due to their relatively large size and low penetrating power. Beta particles have medium ionizing ability as they are smaller and more penetrating than alpha particles. Gamma rays have the highest ionizing ability because they are electromagnetic waves that can penetrate deeply into materials, causing damage to biological tissues.
Which interacts more with a medium?
Light interacts more with a medium through processes like absorption and scattering, which can affect its propagation and behavior. Sound also interacts with a medium through transmission, reflection, and absorption, but light interactions are more complex due to its dual wave-particle nature.
What is traveling medium of radiation?
Electromagnetic Radiation requires no medium. Light is a form of electromagnetic radiation, and it can traverse the stars.
What are the characteristics of electromagnetic radiation and how do they influence its behavior?
Electromagnetic radiation is a form of energy that travels in waves and does not require a medium to propagate. It has characteristics such as wavelength, frequency, amplitude, and speed. These characteristics determine how electromagnetic radiation behaves, including how it interacts with matter, how it is absorbed or reflected, and how it can be used in various applications such as communication, imaging, and energy generation.
What do you call to a colloidal suspension in which a gas is the suspending medium?
- solid in gas: solid aerosol - liquid in gas: liquid aerosol
Why does radiation not need a medium?
Radiation does not require a medium because it travels in the form of electromagnetic waves or particles that do not rely on a medium for transmission. This means that radiation can propagate through empty space, unlike sound waves, which require a medium like air or water to travel through.
When a beam of radiation enters some medium experiences a collision event and fails to exit the medium this is called?
This is called absorption. The beam of radiation is absorbed by the medium, leading to the loss of energy and failure to exit the medium.
In which form of heat transfer is a medium not required?
Heat transfer by means of radiation doesn't heat the medium. In fact, radiation doesn't even require a medium in order to work. Strictly speaking, convection doesn't heat the medium either. Convection transfers heat by moving the medium around. Of course, heat also spreads throughout the medium by conduction while the convection is going on.
What is the difference between absorbed dose and equivalent dose?
sorbed dose (also known as total ionizing dose, TID) is a measure of the energy deposited in a medium by ionizing radiation. It is equal to the energy deposited per unit mass of medium, and so has the unit J/kg, which is given the special name gray (Gy).ote that the absorbed dose is not a good indicator of the likely biological effect. 1 Gy of alpha radiation would be much more biologically damaging than 1 Gy of photon radiation for example. Appropriate weighting factors can be applied reflecting the different relative biological effects to find the dose equivalent.Dose equivalent= absorbed dose x radiation weighting factor( or quality factor).
What do conduction and convection use that radiation does not what does radiation use instead?
Conduction and convection require a medium (such as a solid or fluid) to transfer heat, whereas radiation can transfer heat through empty space without a medium. Radiation uses electromagnetic waves to transfer heat instead of relying on a material medium.
