Also remember that bouncing light-even into a shiny reflector that keeps light directional - adds to the distance it travels.

同样还要注意的是，经过反射的光线其行进的距离也会增加，即使使用光面反光板也一样。

youdao

It just checks and sees what kind of light frequencies are bouncing off the object.

只要能让它检验出,物体反射的光的频率

耶鲁公开课 - 死亡课程节选

Changes in the ions' vibration rate were measured by bouncing laser light off them.

ECONOMIST: Scientists measure a few yoctonewtons for the first time

That happens because, provided those electrons that have given off light are quickly pumped back to their excited states, the light bouncing around between the mirrors will stimulate the production of yet more light and a powerful, coherent beam will emerge.

ECONOMIST: Optoelectronics

To make them sensitive to the deflection caused by pressure, the researchers carved grooves in the fibres along their length so that the bouncing of the light was less efficient at the point where pressure was applied.

BBC: 'Magic carpet' can detect or even predict a fall