How to put the ring in the middle of the book, when the light shines, it can have a heart-shaped pattern.

2. Find a ring (round enough)

3. Place the ring vertically in the middle of the book, and make sure that the cross section of the ring is facing the light source.

4. When the light source shines on the cross section of the ring at a certain angle from a distance, a shadow heart shape will be obtained.

Extended data:

"Heart" is a pattern, which originated from the word "heart" in China Oracle Bone Inscriptions. Is to express people's beautiful feelings.

According to research, because ancient science and technology were not developed, before the Ming Dynasty, the ancients in China always thought that all human thinking activities were also born from the heart.

Therefore, the ancients believed that the heart is not only an organ, but also an organ in charge of thinking, and all thoughts and emotions are born from the heart. The heart shape later evolved into a symbol to express people's good feelings.

It is similar to an ellipse, but the lower part of the blade is wider, and the base is concave into a sharp shape, which looks like a heart, so it is called a heart-shaped leaf. Such as the leaves of Chinese redbud.

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