Table of Contents
- 1 Does radiation require matter?
- 2 Can radiation happen in an empty space?
- 3 What does radiation does not require?
- 4 What state of matter does radiation occur in?
- 5 Why is space cold but Earth hot?
- 6 Does radiation travel at the speed of light?
- 7 How do radiation particles move?
- 8 Why does radiation cause mutation?
- 9 What are the four factors that affect the effects of radiation?
- 10 Why can α radiation not penetrate deeply into an object?
- 11 How does radiation affect health other than cancer?
Does radiation require matter?
Radiation is the only way of transferring thermal energy that doesn’t require matter.
Can radiation happen in an empty space?
The thermal radiation also called infrared radiation can transmit heat through empty space. In the radiation no mass is exchanged and no medium is needed. For example the heat from the sun or heat emitted from the filament of a light bulb is an example of the radiation.
Does radiation require particles to move?
Because there are no particles in space, it’s a vacuum, radiation does not need a medium to travel through. The Sun’s rays (radiation) travel at the speed of light; 300,000,000 m/s.
What does radiation does not require?
In terms of heat transfer, radiation is the emission of thermal energy in the form of infrared waves. Since heat is carried by electromagnetic waves, it does not need a physical medium to transfer it. Instead it radiates through space – this is how the Earth is heated by the Sun despite space being a vacuum.
What state of matter does radiation occur in?
Radiation does not need any matter for propagation of heat. But in presence of solid, liquid or gas radiation may take place, for example: if you stand near a very hot object you feel hot because of radiation. But you are standing in air so is the hot object which is gas still you feel the radiated heat.
Which of the following does not require matter to move through it?
The transfer of thermal energy by conduction and convection (does not) require matter. The transfer thermal energy by radiation (does not) require matter. A material in which thermal energy moves easily is an (insulator). Thermal energy is transferred by radiation more easily in (gases).
Why is space cold but Earth hot?
The reason outer space is so cold is because cold is what you get when there is no source of heat nearby. Objects in space cannot cool off by thermal conduction or convection, but they can cool off by radiating infrared light. All objects do this, and they radiate more the hotter they get.
Does radiation travel at the speed of light?
Electromagnetic radiation is an electric and magnetic disturbance traveling through space at the speed of light (2.998 × 108 m/s). It contains neither mass nor charge but travels in packets of radiant energy called photons, or quanta.
How does radiation take place?
Radiation is energy. It can come from unstable atoms that undergo radioactive decay, or it can be produced by machines. Radiation travels from its source in the form of energy waves or energized particles. There are different forms of radiation and they have different properties and effects.
How do radiation particles move?
Radiation happens when heat moves as energy waves, called infrared waves, directly from its source to something else. When the heat waves hits the cooler thing, they make the molecules of the cooler object speed up. When the molecules of that object speed up, the object becomes hotter.
Why does radiation cause mutation?
High levels of ionizing radiation can result in double-strand DNA breaks. Ultraviolet (UV) radiation from the sun results in dimerization of thymidine residues in DNA, and defective repair of these dimers leads to mutation.
How did radiation turn into matter?
When high-energy photons go through strong electric fields, they lose enough radiation that they become gamma rays and create electron-positron pairs, thus creating a new state of matter. It will then be followed by the release of high-energy photons, electrons, and positrons.
What are the four factors that affect the effects of radiation?
The effects of ionizing radiation depend on four factors: The type of radiation, which dictates how far it can penetrate into matter The energy of the individual particles or photons The number of particles or photons that strike a given area per unit time The chemical nature of the substance exposed to the radiation
Why can α radiation not penetrate deeply into an object?
Because of its high charge and mass, α radiation interacts strongly with matter. Consequently, it does not penetrate deeply into an object, and it can be stopped by a piece of paper, clothing, or skin.
What is the difference between matter and radiation?
radiation – radiation – The structure and properties of matter: Matter in bulk comprises particles that, compared to radiation, may be said to be at rest, but the motion of the molecules that compose matter, which is attributable to its temperature, is equivalent to travel at the rate of hundreds of metres per second.
How does radiation affect health other than cancer?
Radiation can damage health in ways other than cancer. It is less likely, but damage to genetic material in reproductive cells can cause genetic mutations, which could be passed on to future generations. Exposing a developing embryo or fetus to radiation can increase the risk of birth defects.