观看免费视频 Emmiting Light
动画说明：
In this O Wow Moment Video from the Children's Museum of Houston, we explore how LEDs work and how you can make a simple flashlight using an LED, some self-adhesive foam, and a battery.
In this O Wow Moment Video from the Children's Museum of Houston, we explore how LEDs work and how you can make a simple flashlight using an LED, some self-adhesive foam, and a battery.