Which is easier than modern physics experiments?

University Physics Experiments.

books). This textbook is compiled in accordance with the teaching requirements of the undergraduate physics laboratory course issued by the Ministry of Education. There are seven chapters in the book, which systematically introduces the data processing knowledge related to university physics experiments, comprehensively expounds the seven experimental measurement methods commonly used in physics experiments, arranges 12 basic experiments, 11 applied and design experiments, 12 comprehensive and modern physics experiments, and introduces the computer simulation of physics experiments.

This book is based on the Basic Requirements for the Teaching of Physics Experimental Courses in Science and Engineering Universities (2008 Edition) formulated by the Teaching Guidance Subcommittee of Physics and Astronomy Teaching Steering Committee of Colleges and Universities of the Ministry of Education.

The book is divided into six chapters: "Measurement Error, Uncertainty and Data Processing", "Basic Training of Physical Experiments", "Basic Experiments", "Comprehensive Experiments", "Design Experiments", and "Research Experiments", with 71 experiments.

In terms of overall design, we strive to implement the concept of student-oriented, and pay attention to the organic unity of foundation, practice, exploration and openness. While highlighting the basic skills training, the proportion of comprehensive, design and research experiments has been increased, and attention has been paid to the teaching and application of science and engineering majors.

There is no such thing as easy in the adult world.

Unit 1: Atomic Physics 1-1 Zeeman Effect 1-2 Blackbody Radiation 1-3 Atomic Spectroscopy Unit 2: Nuclear Detection Techniques 2-1 Geiger-Miller Counters and Statistical Laws of Nuclear Decay 2-2 Verification of the Relativistic Effect of Fast Electrons 2-3 Absorption of Radiation by Matter 2-4 Absorption of Radiation by Matter Unit 3 Microwave Experiment 3-1 Measurement of Voltage Standing Wave Ratio in Microwave Systems 3-2 Microwave Optics Unit 4 Magnetic Resonance 4-0 Fundamentals of Magnetic Resonance 4-1 Nuclear Magnetic Resonance 4-2 Microwave Electron Paramagnetic Resonance 4-3 Microwave ferromagnetic resonance 4-4 Optical pump magnetic resonance Unit 5 Laser and Optics 5-1 Mode Analysis of HeNe Lasers 5-2 Electro-Optical Effect and Electro-Optical Modulation of Crystals 5-3 Measurement of the thickness and refractive index of dielectric films by ellipsometry 5-4 Single photon counting 5-5 Michael Erson interferometry to measure the refractive index of gases 5-6 Spatial single-point optical coherence tomography Unit 6 Optical Communication Technology 6-1 Transmission of Audio Signals in Optical Fiber 6-2 Digital Signal Coding and Transmission in Optical Fiber Unit 7: Vacuum and Low Temperature 7-1 Vacuum Acquisition and Measurement 7-2 Zero Resistance Phenomenon of High-Temperature Superconductors Unit 8: Parameter Testing of Solid Materials 8-1 Thermal Conductivity Measurement by Thermal Wave Method (Dynamic Method) 8-2 Thermal Conductivity Measurement by Flash Method Unit 9: Circuit and Physical Measurement 9-1 Chaos in Nonlinear Circuits 9-2 Lock-in Amplifier.

The topic is too big.

Who knows what experiments physicists are doing today?

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

For example, this experimental method is used in experiments such as "what factors are related to pressure", "the relationship between current and resistance", and "the relationship between the tone of a stringed instrument and the tightness, length and thickness of the string".

2 Analogy: For example, when learning about electric currents, make an analogy with the flow of water that is familiar to you in your life for a better understanding.

Experiment + reasoning: Some theories can only be obtained experimentally in an ideal space, and at this time, we can deduce these theories on the basis of experiments under real conditions.

For example, in the second year of junior high school, we learned Newton's first law: all objects always remain at rest or in a uniform linear motion when they are not subjected to force. We know that objects are bound to be subjected to drag during their motion, but we can deduce this conclusion through many experiments.

3 Descriptive: For example, there is no such thing as light in life, and we introduced the word "light" in order to better learn about light.

4 Conversion method: For example, when we learn that sound is produced by vibration, we convert the small short answer vibration of a tuning fork into the oscillation of a ping-pong ball. Make the experimental phenomenon more obvious.

5. Model method: When we learn the structure of atoms, in order to better understand the internal structure of atoms, we use the solar system model to represent the atomic structure.

Hello. Test Name: Balloon Deflated.

Materials used: two balloons (for the effect, it is recommended to use a large football), transparent tape, two sewing needles. Preparation for production:

Blow up the balloons and tie them tightly, tying the two balloons A and B to the ends of a piece of leaden log. One of the balloons B is taped to the front of the balloon (at a 45-degree angle for easy observation and handling). Presentation Skills:

Take a needle and insert it into the upper part of the front of balloon A facing the audience, and take another needle to insert it from the place where balloon B is taped with transparent tape. Slowly pull out the sewing needle from balloon A, and the balloon will pop with a "pop" (be safe, hold the sewing needle in your hand). Then slowly pull out the sewing needle from the balloon B, and you will see gas slowly coming out of the pinhole, but the balloon slowly deflats like a deflated tire.

It is best to add some smoke into the balloon when you blow it in, so that the effect is better) Experimental principle: According to common sense, use a needle to puncture the balloon directly, and the balloon will definitely **. Because when a balloon bursts, the spilled air creates a pressure to which the rubber and tape react differently.

When the compressed air rushes out of the place where the balloon was punctured, the rubber is brittle and thin, and the balloon skin is burst at once, and at the same time there is a loud cracking sound. Scotch tape is strong enough to withstand the pressure caused by the compressed air rushing out, so the balloon won't snap. In production practice, run-flat tires are made according to this principle.

Description: This experiment should be rehearsed in advance, and Huailuwan should ensure success; Be careful when carrying balloons to avoid being punctured; The effect of this experiment is very important for "strengthening."

In junior high school physics experiments, it is difficult to succeed in the experiment of crystal melting, because the sea country used in the process of doing the experiment often does not have a very high purity in the laboratory, so it will appear in the melting process. During part of the melting process, the temperature continues to rise, and there is no characteristic of this crystal melting, so it is difficult to succeed in this experiment, unless a very pure sea wave is found.

In addition, the gas liquefaction experiment is easy to do, which means that when the ether is used to do this experiment, it will often cause the classroom to be polluted, which will cause some damage to the body and mind.

It is more likely that the ice melting experiment and the compression ignition instrument experiment will not be successful, or that the experimental phenomenon will be different from what was expected.

All the accidental errors caused by the scale estimation of the measurement tool can be averaged by multiple measurements, so that the positive and negative errors cancel each other out to reduce the error.

Because, probabilistically speaking, when there are enough measurements, the positive and negative errors account for half of the error.

The error (systematic error) caused by the manufacturing process and other reasons of the measurement method is not complete, and the error (systematic error) caused by the measurement or base measurement tool itself cannot be reduced by the method of finding the average shirt skin by multiple measurements.

As the saying goes: "physical brain chemical head".

To study physics you have to understand the so-called "physical situation", but there are two situations in which you have to experiment:

1.Explore. You finally come to a conclusion, you think that the theory can stand up to the first judgment, then you have to experiment to support your theory, so that it becomes a theory acceptable to the public, the so-called "more experiments on the road of exploration" is how it comes about;

2.Verify. When you are skeptical of someone else's theory or the results of an opener, you can experiment to give you an informed answer, such as "Two pieces of iron of different weights."

At the same time, "etc......

Judging from the current situation, it is necessary to learn physics and do experiments, but it is not necessary, many students are eager to do Jean Can Bi experiments, but they are not conditional, but they are also great at physics, learn physics well, buddy support you a trick: look at more example problems! Everything is easy to do, the exam question types are all on the example questions, maybe there are original questions!

Physics knowledge is based on practice, especially in the practice of experiments, so physics is an experiment-based discipline. It reveals many truths in the basic forms of motion in nature with concepts, principles and laws, and its knowledge and ideas have become a major part of human culture, which means that physics itself is the unity of scientific knowledge, scientific process and scientific culture, so a considerable part of the concepts are extremely abstract, and experiments can concretize and intuitiveize these abstract concepts.

Therefore, in the process of learning physics, experiments are an important method to understand knowledge correctly and profoundly. In addition to doing experiments in school according to the requirements of the textbook, students should also use the experimental skills they have learned to do as many experiments as possible to improve their hands-on ability, and maybe they can also put forward constructive opinions and methods to make some kind of invention while doing experiments!

This part of the physics experiments mainly includes small experiments to explore the composition of matter, such as decomposing sunlight, how much oxygen there is, and so on; Introduce small experiments on the difficulties of physics knowledge, such as balloon blowing, watch development, etc.; Some small experiments on the principle analysis of common fiber destroying appliances, such as sprayers, reaction forces, etc.; and some other interesting physics experiments.