| 释义 |
WordReference Random House Unabridged Dictionary of American English © 2024dif•frac•tion (di frak′shən),USA pronunciation n. [Physics.]- Physicsthe phenomenon exhibited by wave fronts that, passing the edge of an opaque body, are modulated, thereby causing a redistribution of energy within the front: it is detectable in light waves by the presence of a pattern of closely spaced dark and light bands (diffrac′tion pat′tern) at the edge of a shadow.
- Physicsthe bending of waves, esp. sound and light waves, around obstacles in their path.
- Neo-Latin diffrāctiōn- (stem of diffrāctiō) a breaking up, equivalent. to Latin diffrāct(us) broken up (past participle of diffringere) + -iōn- -ion. See dif-, fraction
- 1665–75
Collins Concise English Dictionary © HarperCollins Publishers:: diffraction /dɪˈfrækʃən/ n - a deviation in the direction of a wave at the edge of an obstacle in its path
- any phenomenon caused by diffraction and interference of light, such as the formation of light and dark fringes by the passage of light through a small aperture
Etymology: 17th Century: from New Latin diffractiō a breaking to pieces, from Latin diffringere to shatter, from dis- apart + frangere to break |