| Webster's Online Dictionary |
| Expressions | Definition | ||
| Hard radiation | Hard radiation is a term used to describe high-energy electromagnetic radiation, typically high energy X-rays or gamma rays. The term refers to the ability of the rays to penetrate a given thickness of material, typically a lead shield. (references) | ||
Source: compiled by the editor from various references; see credits. | Top | ||
| Expressions | Domain | Definition | |
| Hard radiation | Aerospace | Radiation of high penetrating power; that is, radiation of high frequency and short wavelength. A 10-centimeter thickness of lead is usually used as the criterion upon which the relative penetrating power of various types of radiation is based. Hard radiation will penetrate such a shield; soft radiation will not. (references) | |
| Hard radiation | Mining | Ionizing radiation of short wavelength and high penetration. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
