About the mirror
Category: Education/Science>>Enrollment>>High School Entrance Exam
Analysis:
Mirrors can be roughly divided into three types: plane mirrors, concave mirrors and convex mirrors , was later used by Feng Shui masters as Feng Shui mirrors, and developed into Bagua mirrors, tiger head mirrors, etc.
The ancient Greek scientist Archimedes studied the reflection of light from plane mirrors and spherical mirrors and discovered that spherical concave mirrors have the property of focusing light to a focus. The speed of light is 300,000 kilometers per second. From the earth to the moon, the entire distance is 380,000 kilometers, and the light only takes a little more than 1 second. It only takes 8 minutes for light to travel 150 million kilometers from the sun to the earth. Physics tells us that the seven colors of light in the spectrum only occupy a small narrow band in the electromagnetic spectrum. There are many electromagnetic waves besides red light and ultraviolet light. Visible light is related to gas. The beams of light waves projected from the universe to the earth will condense into a stream or a group of gas, just like small balls, which will directly affect the human body. The ancients said that "gathering will form", "dispersing will form Qi", "there must be Qi if there is a form", "form will be transformed from Qi, and form will return to Qi". The meaning is very obvious, that is, what kind of objects are on the ground? What kind of "Xingsha" (qi of the object) will appear. It’s no wonder that when another building’s sharp corner rushes toward your door or window, you’re bound to be uncomfortable.
Plane mirrors are ordinary mirrors that have the function of "reversing". They not only reflect or "push back" foreign objects, but also have greater power because they go back in the opposite direction to the original. , so it has the effect of "diffusion and offset", which is called "feedback" in electronics, and it is "negative feedback"; positive feedback has an increasing effect, and negative feedback has a decreasing effect.
A convex mirror is like a turtle shell. The mirror surface is a convex arc shape. In addition to reflecting, it also has the effect of astigmatism. The shape is the same as a car reflector. When objects with evil spirits rush towards you, these evil spirits can be removed. Therefore, the convex mirror is a tool for "resolving evil spirits".
Concave mirrors have aggregation effect, similar to the appearance of microwave antennas. If you see mountains, green waters, or beautiful gardens outside your house, you can use a concave mirror to "breathe in" them to increase the auspiciousness of the house.
Commonly used mirror functions:
First, the most primitive function is to reflect the appearance of the person or object in front of the mirror based on the principle of light emission.
Second, gather light to make fire.
Third, hanging a large mirror on the wall, relying on the reflection principle of the mirror, can visually increase the permeability of the room and broaden people's visual range, thereby relieving stress. Placing green plants where mirrors can reflect them will also relieve visual fatigue to a certain extent.
4. To prevent tracking, hold the small mirror in your hand to see behind you
5. Looking in the mirror more often is good for your health! The St. Petersburg Institute of Continuing Medical Education in Russia confirmed this through experiments. The radiation reflected by the mirror has an effect on the optical density of the blood, which is related to the blood itself, the metallic composition of the mirror coating, the shape of the mirror, and the composition of the air between the mirror and the blood. Under the action of its own radiation, the water molecules in the body vibrate, resulting in an increase in the antioxidant properties of the blood and the activity of enzymes in the blood, which overall improves the biological functional activity of the body.