If no one is there, will the perfume still smell?

  In the biology class, the teacher asked the students a strange and interesting question: “If no one is there, will Chanel perfume still smell?” Is this still necessary? The fragrance of perfume exists objectively, and it has nothing to do with the presence or absence of anyone.
  Does it really have nothing to do with whether anyone is present? The subsequent explanation of the biology teacher made us wake up.
  The so-called smell is qi plus flavor. Qi is a gas, a volatile matter, it is a substance, usually a small molecule, so it is easy to become a gas. Taste is sensory perception, which refers to the changes in physical quantities (physical quantities can be electricity, magnetism, light, length or volume, ion current, molecular current, etc.) after molecules act on the surface of the senses (sensors), and the signals generated are transmitted to the brain through nerves . Therefore, smell does not refer to a substance, but a process of interaction between substances.
  It can be seen that if there is no sense of smell, there is no smell. Different people will have different feelings about the same smell, so they will have different evaluations. Even when the same person is in different environments and different emotions, they will have different feelings and evaluations of the same smell.
  There is a similar question: If no one is present, will the safflower be red? Think about it carefully, this question is the same as the first question. Color is the visual perception of light produced by the eyes, brain and people’s life experience. The light seen by the naked eye is produced by electromagnetic waves with a very narrow frequency range. Electromagnetic waves of different frequencies show different colors. The recognition of colors It is the visual nerve sensation caused by the naked eye being stimulated by electromagnetic wave radiation. That is to say, without the involvement of human optic nerve, color does not exist.
  Similarly, different people have different feelings of electromagnetic waves of the same frequency. “Color blindness” is an extreme example. In the 18th century, the famous British chemist and physicist Dalton bought a gift-a pair of “brown-gray” socks for his mother on Christmas Eve. After seeing the socks, my mother felt that the colors of the socks were too bright, so she said to Dalton, “You buy me a pair of cherry red socks, how can I wear them?” Dalton felt very strange. The socks were obviously brown-gray. , Why would mother say it is cherry red? Dalton, who was puzzled, went to ask his brother and others around him again, except that his brother had the same opinion with him, everyone else said that the socks were cherry red. After careful analysis, Dalton found that he and his younger brother’s color vision was different from others. It turned out that he and his younger brother were both color blind. Although Dalton was not a biologist or medical scientist, he became the first person to discover color blindness and the first person to be discovered color blindness.
  I also remembered a story in “The Complete Book of Wang Wencheng”: Mr. You Nanzhen, a friend pointed to the flower tree in the rock, and asked: “There is nothing outside the world, so flowers and trees bloom and fall in the deep mountains, in my heart What’s the matter?” The gentleman replied: “When you didn’t see this flower, this flower and your heart are in silence; when you see this flower, the color of this flower is understood for a while, and you know that this flower is not outside your heart.” Just saw the story. , I feel that Mr. “Nothing outside of the heart” and “Nothing outside of the heart” are ridiculous-whether you are present or not, the flowers are there, and they are not changed by human will.
  Thinking about it now, what the husband said is not completely unreasonable. At least, if no one is present, the fragrance and color of the flower are “non-existent”. Undoubtedly, this suggests another way to look at themselves and the world.

香水还香