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单词 Light trap
释义

Light trap

英语例句库

Results showed that western lygus bugs, Lygus hesperus (Knight), were attracted to UV light traps in laboratory and greenhouse studies.

结果显示紫外萤光在暗房中和紫光两极管在温室中对西方盲椿有吸引力。

原声例句
昆虫王国第二季 (原声版)

I will work late tonight and then I will go out and check my light trap.

我今天会工作到深夜之后我要去检查灯光捕虫网。

昆虫王国第二季 (原声版)

Tonight we are going to test a new kind of light trap which we are going to attach to the front end of this jeep.

今晚我们要试验一下一种新型灯光捕虫器我们把它放在这辆吉普车的前面。

TED演讲(视频版) 2022年10月合集

This tiny green mantis has a translucent body and intrigues us because it was found only through our non-lethal lights trap which attract winged males.

这只绿色的小螳螂有一个半透明的身体并引起了我们的兴趣,因为它是通过我们的非致命灯光陷阱发现的,这种灯光陷阱会吸引有翅膀的雄性。

无名的裘德(下)

At this hour a light trap, among other vehicles, was driven into the town by the north road, and up to the door of a temperance inn.

就在这个时候,一辆轻型陷阱车和其他车辆一起从北路开进了镇子,一直开到一家节制旅馆门口。

英语百科

Optical tweezers

Dielectric objects are attracted to the center of the beam, slightly above the beam waist, as described in the text. The force applied on the object depends linearly on its displacement from the trap center just as with a simple spring system.
Ray optics explanation (unfocused laser). When the bead is displaced from the beam center (right image), the larger momentum change of the more intense rays cause a net force to be applied back toward the center of the laser. When the bead is laterally centered on the beam (left image), the resulting lateral force is zero. But an unfocused laser still causes a force pointing away from the laser.
Ray optics explanation (focused laser). In addition to keeping the bead in the center of the laser, a focused laser also keeps the bead in a fixed axial position: The momentum change of the focused rays causes a force towards the laser focus, both when the bead is in front (left image) or behind (right image) the laser focus. So, bead will stay slightly behind the focus, where this force compensates the scattering force.
A generic optical tweezer diagram with only the most basic components.

Optical tweezers (originally called "single-beam gradient force trap") are scientific instruments that use a highly focused laser beam to provide an attractive or repulsive force (typically on the order of piconewtons), depending on the refractive index mismatch to physically hold and move microscopic dielectric objects similar to tweezers. Optical tweezers have been particularly successful in studying a variety of biological systems in recent years.

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更新时间:2025/6/17 23:02:38