How does an X-ray work BBC Bitesize?
They are a form of nuclear radiation. High energy waves such as X-rays and gamma rays are transmitted through body tissues with very little absorption. This makes them ideal for internal imaging. X-rays are absorbed by dense structures like bones, which is why X-ray photos are used to help identify broken bones.
Which positions are X-rays found in?
Body positions
- erect: either standing or sitting.
- decubitus: lying down.
- supine: lying on back.
- Trendelenburg position: the patient is supine (on an inclined radiographic table) with the head lower than the feet.
- prone: lying face-down.
- lateral decubitus: lying on one side. right lateral: right side touches the cassette.
What is gamma radiation BBC Bitesize?
gamma radiation is high energy electromagnetic waves emitted from unstable nuclei; gamma radiation easily passes through air, paper, skin and aluminium but can be partly blocked by thick lead or concrete; leaves mass number and atomic number unchanged; gamma rays produce the least ionization.
What is ultraviolet radiation uses for BBC Bitesize?
Ultraviolet light in sunlight can cause the skin to tan or burn and can also damage eyes. Fluorescent substances are used in energy-efficient lamps – they absorb ultraviolet light produced inside the lamp, and re-emit the energy as visible light. UV light is also used for banknote security and disinfecting water.
What is radiation ks2?
Radiation is energy that moves from one place to another. Light, sound, heat, and X-rays are examples of radiation. The different kinds of radiation fall into a few general categories: electromagnetic radiation, mechanical radiation, nuclear radiation, and cosmic rays.
What is non Ionising radiation BBC Bitesize?
Non-ionising radiation (NIR) is the part of the electromagnetic spectrum covering optical radiation (ultraviolet (UV), visible and infrared) and electromagnetic radiation (power frequencies, microwaves and radio frequencies).
What is ultraviolet light ks3?
UV radiation has a shorter wavelength and higher energy than visible light. UV light can have positive and negative effects on human health. A good portion of the sun’s UV rays are absorbed by the atmosphere’s stratospheric ozone layer. Some animals, birds, butterflies and insects can see UV rays.
What does radiation mean BBC Bitesize?
Radiation is described as the transfer of heat energy by electromagnetic waves without involving particles. Convection is described as the movement of particles of gases and liquids away from a heat source to form currents.