Why do sunflowers have a discounted face?
Have you found that the aspect ratios of ID cards, bank cards, subway tickets, train tickets, student cards, meal cards and all kinds of membership cards are all the same? You might as well pick up the card at hand and measure it, and you will find that the aspect ratio of these cards is close to 0.618.
Yes, this number is the legendary "golden section" φ, which is about 1.618. You may also have heard of the Fibonacci series, where each number is the sum of the first two numbers, and the ratio of the two adjacent numbers approaches φ.
However, in reality, people feel that the proportion of beauty may not be exactly in line with the value of φ. An experiment shows that people will feel good-looking as long as it is a rectangle within the range of 1.4mur1.7.
It is natural to "understand" the meaning of φ better than human beings.
Sometimes, plants must "consider" the economy of space. In the case of inflorescences, some plants must arrange as many florets together as possible to enhance the attractiveness of "floret groups" and reduce mutual interference between florets, with as little overlap between florets as possible. make sure these florets have average space. The simulation shows that the arrangement of one flower per rotation of 137.5 °(2 π × (1-0.618)) is the most reasonable design, while in practice, the inflorescence of Compositae (such as sunflower) is arranged in this way.
The inflorescence of a sunflower. Picture: Pixabay
Does this spiral look familiar? Picture: TeXample.net
Count the spirals that extend outward from the center of the sunflower, and you will also find 34 left-handed curves and 21 right-handed curves on the sunflower disk with 300 florets. A larger disk can find more spirals, but the number of spirals is always Fibonacci. Similarly, it was found that the flowers and seeds of pineapple and pine cones were similarly arranged, with 8 spirals and 13 spirals. 34, 21, 8, 13, these are Fibonacci numbers.
The spiral of the pine tower: left-handed 13, right-handed 8. Picture: pinterest.com
You can say that natural selection is 0.618.
φ day (June 18) is approaching, on that day, 2018 has just passed 168 days. The fruit shell store has sent you a surprise discount in the middle of the year--
Fruit shell store is on sale in 618 years.
All the goods in the store except books
A maximum reduction of 100 yuan
There are also small chapter package offers that can be superimposed.
Come and buy it.
Scan the code and get the coupon immediately.
Discount on selected items
After 168, a reduction of 10 yuan
Original hand-painted scarf
Original price 168
158 yuan to take away
Natural theme scarf
Original price 238
228 yuan to take away
A reduction of 30 yuan will be made after 268.
Stereo microscope
Original price 380
350 yuan to take away
Six little fat chirps
The original price is 420
390 yuan to take away
Human roaming kidney bracelet
Original price 288
258 yuan to take away
A reduction of 100 yuan at the end of 618
Astronomical telescope
Original price 850
750 yuan to take away
Jingjia Ruili birdwatching mirror
The original price is 1900
1800 yuan to take away
Raindrop necklace & earrings
The original price is 1102
1002 yuan to take away
Full reduction of the whole audience, discount stack!
Fruit shell Tee, notebook, badge,
Accessories, electric toys, quantum building blocks.
Around your favorite 1000 + fruit shell
All can be reduced!
Can also be superimposed with other discounts, super cost-effective!
The offer has already begun.
Scan the code and use it immediately
- Prev
Some private clubs don't stand out indoors, but they look great here.
Terrace, is the most romantic and warm place, or light clouds, blue sea, or early lights, stars thousands of miles. Talking and laughing, here let you run to the distance, into infinite reverie. See more indoor private clubs, and now exposure to flowers,...
- Next
Will the little pronghorn cut its mother's belly when it is born?
Addax nasomaculatus, the protagonist of today's calendar, will be quite strange to most people. Compared to African antelopes such as wide-angle antelope, Tang's gazelle and wildebeest, which often appear on TV, pronghorn.
Related
- Wuhan Hospital Iron Tree Blooming Result Was Instantly Frightened by the Gardener Master
- Which variety of camellia is the most fragrant and best? Which one do you like best?
- What is the small blue coat, the breeding methods and matters needing attention of the succulent plant
- Dormancy time and maintenance management of succulent plants during dormancy
- Minas succulent how to raise, Minas succulent plant pictures
- What are the varieties of winter succulent plants
- How to raise succulent plants in twelve rolls? let's take a look at some experience of breeding twelve rolls.
- Attention should be paid to water control for succulent plants during dormant period (winter and summer)
- Watering experience of twelve rolls of succulent plants
- Techniques for fertilizing succulent plants. An article will let you know how to fertilize succulent plants.