Physico-crumb lens law experiment in junior high school: the mystery of exploring light
Purpose of the experiment
The purpose of the clear and clear experiment is the lighthouse in front of us. We aim to see in depth, in practice, the patterns of lens imaging, the delicate and crucial relationship between the nature of the images (right or upside down, zooming or shrinking, reality or fiction) and the distance. It's like solving a mystery, and every data, every image is part of the puzzle, waiting for us to collage complete patterns。
Ii. Experimental equipment
Experimental devices are a tool for our exploration, and they look ordinary, but they have endless secrets. As the core of the experiment, it's like a magic lens that controls the direction of light. The candle, that little flame, is our source of light, and it sends out a light like a brave explorer that travels through the convulsions. The screen, like a faithful recorder, implicitly embraces and presents the light world shaped by the lens. There are also photometers (or straight feet) that provide us with precise measurements that allow us to accurately measure the values of distance and pixels. And the matches, although a small ignition tool, set the whole experiment on fire。
Iii. The experimental steps
- it's a crucial step in the success of the experiment. We have stabilized the lens in the middle of the light seat as if a central stage had been built for the journey. Ensuring that the centre of the lens is roughly on the zero-scale line of the light seat provides an accurate reference for subsequent measurements。
- next, candles are placed on the side of the cones, and it's like a dynamic actor ready to show his light on this stage. The screen was placed on the other side of the convection mirror, waiting silently for a reflection of the receiving candlelight through the lens。
- then we carefully calibrated the height of the candles, the cascading mirrors and the light screens to make their centre roughly the same height. This step is essential, as it is to adjust the best position for the entire performance team to ensure that the image of the candle is perfectly placed in the centre of the screen, allowing us to observe clearly and measure accurately. Imagine if they were at different heights, the light would be like a lost child, unable to gather accurately on the screen, and we would not be able to see a clear image, and the experiment would not go smoothly。
