They chose the correct photograph by breaking an infrared beam near the flat surface showing the photo.
它们可以通过感应屏幕上显示的红外光束来选择名人的照片。
Infrared beam
原声例句
VOA Special 2017年11月合集
华尔街日报
We have a transmitter, which is like an inner solar that delivers an invisible infrared beam and the receiver converts the infrared beam back into electricity.
我们有一个发射器，它就像一个内部的太阳能，它发出不可见的红外光束，接收器将红外光束转换回电能。
英语百科
Light beam
![A Symphony of Lights in Victoria Harbour, Hong Kong[1]](/uploads/202501/20/Hk-Symphony_of_Lights_34202141.jpg)
A light beam or beam of light is a directional projection of light energy radiating from a light source. Sunlight forms a light beam (a sunbeam) when filtered through media such as clouds, foliage, or windows. To artificially produce a light beam, a lamp and a parabolic reflector is used in many lighting devices such as spotlights, car headlights, PAR Cans and LED housings. Light from certain types of laser has the smallest possible beam divergence.
- SoundScan的意思
- sound scanning device的意思
- soundscape的意思
- soundscape的意思
- soundscape的意思
- Sounds,Cardiac的意思
- sound scatterer的意思
- sound scattering的意思
- sound scattering object的意思
- sound scheme的意思
- sound scope的意思
- soundscore的意思
- soundscores的意思
- sound screen的意思
- Soundscriber的意思
- sound seedling的意思
- sound sensation的意思
- sound sensitive control的意思
- sound sensor的意思
- SoundSentry的意思
- soundsgood的意思
- Sounds Good的意思
- sounds great的意思
- Sound shadow的意思
- soundshadow的意思