How is the physical experiment conducted?

1 control variable method: This should be the most common experimental method. ?

For example, this experimental method has been used in experiments such as "exploring what factors are related to pressure", "exploring the relationship between current and resistance" and "studying the relationship between the timbre of stringed instruments and the tightness, length and thickness of strings".

2 analogy method: for example, when learning electric current, in order to better understand it, use the familiar water flow in life for analogy.

Experiment+Reasoning: Some theories can only be obtained through experiments in an ideal space. At this time, we can deduce these theories on the basis of experiments under realistic conditions.

For example, in the second day of junior high school, we learned Newton's first law: when there is no force, all objects always remain stationary or move in a straight line at a constant speed. We know that objects are bound to be resisted in the process of motion, but we can deduce this conclusion through many experiments.

Description: For example, there is no light in life. In order to learn light better, we introduced the word "light".

Conversion method: For example, when we study the knowledge that "sound is produced by vibration", we convert the tiny vibration of the tuning fork into the swing of the table tennis. Make the experimental phenomenon more obvious.

5 model method: when we study the atomic structure, in order to better understand the internal structure of the atom, we use the solar system model to represent the atomic structure.

Extended data:

Physics experiments are related experiments included in the physics curriculum of junior and senior high schools, including electrical experiments, mechanical experiments, thermal experiments and optical experiments. , often used to verify the theorems and laws of physics.

Compared with theoretical physics, experimental physics is a subject that theoretically explores the basic laws of unknown material structure, interaction and material movement in nature.

The research fields of theoretical physics involve particle physics and nuclear physics, statistical physics, condensed matter physics, cosmology and so on. Including the basic theoretical problems of almost all branches of physics Experimental physics mainly explores the material world and natural laws from experiments.

Laboratory use specification

1. In order to protect experimental instruments and maintain environmental sanitation, students must take off their shoes and enter the laboratory.

2. The laboratory is the place where all teachers and students carry out experimental teaching and scientific research activities. Students should keep quiet and observe discipline after entering the laboratory.

3. Before doing the experiment, listen carefully to the teacher to explain the purpose, steps, performance operation, methods and precautions of the instrument, carefully check whether the required instruments and equipment are in good condition, and report to the teacher in time if there are any defects.

4, the experiment should abide by the operating rules, carefully according to the experimental steps.

5. Pay attention to safety during the experiment to prevent accidents.

6. Take good care of laboratory instruments and equipment.

7. After the experiment, carefully clean the equipment and turn off the water supply.

nature

1. Truth: The theories and experiments of physics reveal the mysteries of nature and reflect the objective laws of material movement.

2. Harmony and unity: The movement of celestial bodies in the mysterious space described by Kepler's three laws shows how harmonious and orderly it is. Several great unifications in physics also show the feeling of beauty. Newton unified all macroscopic objects in the sky and on the ground with three laws and the law of universal gravitation.

The establishment of Maxwell's electromagnetic theory unified electricity and magnetism. Einstein's equation of mass and energy unifies mass and energy. The wave-particle duality theory of light unifies particles and fluctuations. Einstein's theory of relativity unified time and space again.

3. Simplicity: The mathematical language of physical laws embodies the simplicity and portability of physics. Such as Newton's second law, Einstein's mass-energy equation and Faraday's law of electromagnetic induction.

4. Symmetry: Symmetry generally refers to the symmetry of the shape of an object, and the deep symmetry is manifested in the development and change of things or the symmetry of objective laws. For example, the spatial lattice structure of various crystals in physics is highly symmetrical. Vertical throwing motion, simple harmonic vibration, wave mirror symmetry, magnetoelectric symmetry, symmetry of acting force and reaction force, positive particle and antiparticle, positive matter and antimatter, positive charge and negative charge, etc.

5. Predictability: The correct physical theory can not only explain the physical phenomena discovered at that time, but also predict the physical phenomena that could not be detected at that time. For example, Maxwell's electromagnetic theory predicted the existence of electromagnetic waves, Rutherford predicted the existence of neutrons, Fresnel's diffraction theory predicted that there was a Poisson bright spot in the diffraction center of a disk, and Dirac predicted the existence of electrons.

6. Exquisite: The physical experiment is exquisite, and the ingenious design method makes the physical phenomenon more obvious.

References:

Baidu encyclopedia-physics experiment