单词 | concave |
释义 | concave (kɒnkeɪv , kɒnkeɪv ) adjective A surface that is concave curves inwards in the middle. ...a concave stomach. ...the concave bottom of an empty hair spray container. Synonyms: hollow, cupped, depressed, scooped Collocations: concave mirror Pinned to it was a little concave mirror, for making triumphant signal flashes from the summit. Times,Sunday Times It illuminates a smaller area on the concave mirror, leading to a small beam-width on the way to the flat mirror. Retrieved from Wikipedia CC BY-SA 3.0 He later modified the theory to simply involve a concave mirror and a comparator mirror. Retrieved from Wikipedia CC BY-SA 3.0 This involved creating a set up which observed how the position of a concave mirror would affect the real object that it reflected. Retrieved from Wikipedia CC BY-SA 3.0 He often painted with the aid of a concave mirror, and to obtain exactness looked at his subject through a frame crossed with squares of silk thread. Retrieved from Wikipedia CC BY-SA 3.0 It also made effective aesthetic use of the concave shape of the coin's obverse. Retrieved from Wikipedia CC BY-SA 3.0 Calculations are further complicated by the effects of shadowing and thermal reillumination, whether caused by local craters or a possible overall concave shape. Retrieved from Wikipedia CC BY-SA 3.0 The male can be identified by the slightly concave shape to its plastron. Retrieved from Wikipedia CC BY-SA 3.0 In addition, the females' plastrons are much flatter than those of the males, which have a concave shape. Retrieved from Wikipedia CC BY-SA 3.0 Eventually, as the cord continues to unwind, the surface of the water assumes a concave shape as it acquires the motion of the bucket spinning relative to the experimenter. Retrieved from Wikipedia CC BY-SA 3.0 |
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