2016-11-03 11:25来源:9分达人作者:上海管理员
摘要:雅思阅读真题:High Speed Photography高速摄影来自《9分达人雅思阅读真题还原及解析3》的阅读真题回忆,2007年考过哦!
High Speed Photography高速摄影来自《9分达人雅思阅读真题还原及解析3》的阅读真题回忆,2007年考过哦!
10月29日雅思考试阅读部分又考到了9分达人阅读真题还原及解析3&4的原题,分别为Passage 2与《9分达人雅思听力真题还原及解析4》Test 5 Passage 1原题重现;Passage3与《9分达人雅思听力真题还原及解析3》Test 3 Passage 3 原题重现,原文为:Accidental Scientists偶然的科学家 ,小编有在雅思阅读频道分享过此篇文章哦!
今天的文章不要错过哦。说不定下一次考的就是这篇文章哦!
High Speed Photography高速摄影
A Photography gained the interest of many scientists and artists from its inception. Scientists Iiave used photography to record and study rnovements. such as Eadweard Muybridge's study of human and animal locomotion in 1887. Artists are equally interested by these as|tecls but also try lo explore avenues other than photo-mechaiiical represciitalion of rcalily, such as the pictorial ist movement. Military, police, and security forces use pliotograpliy for surveillance, recognition and data storage. Photography is used by amateurs to preserve memories, to capture special moments, to tell stories, to send messages, and as a source of entertainment. Various technological improvements and techniques have even allowed for visualising events that are loo Iasi or too slow for the human eye.
B One of such techni(|ues is called fast motion or professionally known as time-lapse. Time-lapse photography is the perfect technique Tor capturing events and tnovemcnis in the natural world that occur over a timescale too slow for human perception lo follow. Tlie life cycle of a mushroom, for example, is incredibly subtle to the human eye. To present its growth in front of audiences, the principle applied is a simple one: a series of photographs are taken and used iu sequence lo make a moving-image film since each frame is taken with a lapse at a time interval between each shot, when played back at normal speed, a continuous aclion is produced and it appears to speed up. Put simply :we are shrinking time. Objects and events that would normally take several minutes, days or even months can he vieued to completion in seonifls having been sped up by factors of tens lo millions.
C Another commonly used technique is high-speed photography, the science of taking pictures of very fast phenomena. High-speed photography can be considered to be the opposite of time-lapse photography. One of. the many applications is found in biology sudies lo study birds, bats and even spider silk. Imagine a hummingbird hovering almost completely still in ihe air. Feeding on nectar. With every flap, its wings bend, flex and change shape. These subtle movements precisely control the lift its wings generate, making it an excellent hoverer. But a hummingbird flaps its wings up to 80 times every second. The only way to truly capture this motion is with cameras that will, in effect. slow down time, To do this, a greater length of film is taken at a high sampling frequency or frame rate, which is much faster than it will be projected on screen. When replayed at normal speed, time appears to be slowed down
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