UrbanPro
Login Ask & Answer Success Stories Paid Courses Free Classes Tuition & Classes Fees Write a Review All Categories Help Center
Post your Learning Need Signup as a Tutor
✕

Popular Cities

Bangalore

Hyderabad

Delhi

Mumbai

Chennai

Pune

Kolkata

Gurgaon

Ahmedabad

Jaipur

Noida

✕

Take Class 12 Tuition from the Best Tutors

  • Affordable fees
  • 1-1 or Group class
  • Flexible Timings
  • Verified Tutors

Book a Free Demo

Class 12 Tuition > Learn Class XI-XII Tuition (PUC) > What are the postulates of quantum mechanics? I need...
✕

Search in

What are the postulates of quantum mechanics? I need simple answer without much maths and symbols.

Asked by Last Modified  

10 Answers

Learn Class XI-XII Tuition (PUC)

Follow 1
Answer

Please enter your answer

Tutor

Postulates of QM in simple terms without much maths and symbols. Postulate 1:- Every physical state of a system can be only given using a probability value associated with it. This is given by what is called a wave function. Postulate 2 :- Two systems will have a connection (formally called...
read more
Postulates of QM in simple terms without much maths and symbols. Postulate 1:- Every physical state [e.g position] of a system [e.g electron] can be only given using a probability value associated with it. This is given by what is called a wave function. [The 5th postulate is mixed here for a clearer picture of wave function] Postulate 2 :- Two systems [eg: 2 electrons...say one in Mars the other on Earth] will have a connection (formally called quantum entanglement) even if they are not nearby. Measuring a state of an electron on mars might change the value of the electron here if we have their composite (combined) wave-function. Postulate 3 :- For every measurable quantity of a system, there is a way to modify that state [using something called operator] and get a corresponding final value [called eigen functions and values] which may either be discrete or continuous. Postulate 4 :- How a quantum state changes with time can be predicted using a very specific kind of operation [formally known as unitary operator]. Postulate 5:- Finally the most important finding. All measurements and predictions of observable quantities are only probability based and cannot be carried out with 100% accuracy. One can only expect a value for the measured quantity and not be absolutely certain about its real value. read less
Comments
Dislike Bookmark

IIT Educated and well experienced experts selecting only a few highly motivated and ambitious students

Postulate 3. In any measurement of the observable associated with operator , the only values that will ever be observed are the eigenvalues , which satisfy the eigenvalue equation If A is an operator which operates on a wavefunction f and yields the value "a" without altering the wavefunction then we...
read more
Postulate 3. In any measurement of the observable associated with operator , the only values that will ever be observed are the eigenvalues , which satisfy the eigenvalue equation If A is an operator which operates on a wavefunction f and yields the value "a" without altering the wavefunction then we have A (f) = a (f) Such an equation is called an eigenvalue equation. Postulate 4 speaks about how to find the average value of an observable. This is pretty mathematical. Postulate 5 The wavefunction or state function of a system evolves in time according to the time-dependent Schrödinger equation Postulate 6 This is just Pauli 's Exclusion Principle The total wavefunction must be antisymmetric with respect to the interchange of all coordinates of one fermion with those of another. Electronic spin must be included in this set of coordinates. Hope this helps read less
Comments
Dislike Bookmark

Teaching is my passion!!!!

The postulate that energy exists in small discrete quantity or pockets or quantum necessitated a new branch of physics called quantum mechanics. In dealing with matter, matter is made up of a number of fundamental particles. Similarly energy is also made up of a small particle called quantum. Naturally...
read more
The postulate that energy exists in small discrete quantity or pockets or quantum necessitated a new branch of physics called quantum mechanics. In dealing with matter, matter is made up of a number of fundamental particles. Similarly energy is also made up of a small particle called quantum. Naturally , the mechanics that involve quantum and particles of matter cannot be the same as applied to macroscopic matter. The study of quantum and matter particles and their interaction is called quantum mechanics. read less
Comments
Dislike Bookmark

IIT Educated and well experienced experts selecting only a few highly motivated and ambitious students

The fundamental postulates of quantum mechanics are 1. The state of a system is completely described by a wavefunction. Every wave must have something wavy about it and Erwin Schrodinger took this to his heart and described matter waves mathematically by a wave function. This is analogous to...
read more
The fundamental postulates of quantum mechanics are 1. The state of a system is completely described by a wavefunction. Every wave must have something wavy about it and Erwin Schrodinger took this to his heart and described matter waves mathematically by a wave function. This is analogous to the function describing waves on a string. Once u know the wave function of a string u can find out any information about velocity, acceleration etc by taking suitable derivatives. Wave function for matter waves is used analogously. 2. To every observable in classical mechanics there corresponds a linear, Hermitian operator in quantum mechanics. Hermitian operators guarantee that whenever one does any measurement on a wavefunction using an operator, then if the operator is hermitian one will get real numbers as the observed value. Imagine u applie differential operator on a wave equation of vibrating string and got a complex number for velocity then such a velocity is not observable in our experiment. Therefore it will be nice if our differential operator was hermitian so that we get real numbers as oir expected values for measurements represented by the operator. read less
Comments
Dislike Bookmark

Physics and Maths made easy

It is impossible to express postulates of quantum mechanics without mathematics. This is because, the state of a quantum mechanical particle and the act of making a measurement on the particle changing its state cannot be explained in terms of any visualizable pictures. All the pictures of physical processes...
read more
It is impossible to express postulates of quantum mechanics without mathematics. This is because, the state of a quantum mechanical particle and the act of making a measurement on the particle changing its state cannot be explained in terms of any visualizable pictures. All the pictures of physical processes we have are in terms of waves and particles which prevail in our domain as macroscopic (compared to relatively microscopic molecules, atoms, electrons and other fundamental particles) beings and we use also macroscopic apparatus recording results in terms of macroscopic physical interactions. Werner Heisenberg realized microscopic particles involving in such physical activities where Planck's constant is not a small number (mind you, an electron used in e/m experiment by J J Thompson behaved classically) cannot have their dynamical features expressed in terms of waves and particles like pictures. If those pictures are not possible, the only way to express their behaviours in the mentioned limit is with mathematics. You may kindly refer (1) Physics and Philosophy and (2) Physical Principles of Quantum Mechanics, both by Werner Heisenberg. After that, you may also try to answer the question by Merzbacher in his book titled Quantum Mechanics which goes: 'To what velocities should an electron be slowed down to have a de Broglie wavelength 1 m? Are matter waves of such proportions a reality?' Hope what I recommend in this regard will satisfy you. read less
Comments
Dislike Bookmark

tutor

The state of a quantum system is represented by a wave function Principle of superposition. The wave function for two independent systems is the product of the wave functions for the two systems.
Comments
Dislike Bookmark

Naturally , the mechanics that involve quantum and particles of matter cannot be the same as applied to macroscopic matter. The study of quantum and matter particles and their interaction is called quantum mechanics
Comments
Dislike Bookmark

Empowering Students with 18 Years of Expertise in Mathematics and Physics

1.Associated with any particle moving in a conservative field of force is a wave function which determines everything that can be known about the system. 2. With every physical observable q there is associated an operator Q, which when operating upon the wavefunction associated with a definite value...
read more
1.Associated with any particle moving in a conservative field of force is a wave function which determines everything that can be known about the system. 2. With every physical observable q there is associated an operator Q, which when operating upon the wavefunction associated with a definite value of that observable will yield that value times the wavefunction. 3. Any operator Q associated with a physically measurable property q will be Hermitian. 4. The set of eigenfunctions of operator Q will form a complete set of linearly independent functions. 5. For a system described by a given wavefunction, the expectation value of any property q can be found by performing the expectation value integral with respect to that wavefunction. 6. The time evolution of the wavefunction is given by the time dependent Schrodinger equation. read less
Comments
Dislike Bookmark

Math Educator for Std.11th ,12th , Engineering Entrance and Degree Level with 11+ Years Experience

Quantum refers to the quantity. The postulate that energy exists in small discrete quantity or pockets or quantum necessitated a new branch of physics called quantum mechanics. In dealing with matter, matter is made up of a number of fundamental particles. Similarly energy is also made up of a small...
read more
Quantum refers to the quantity. The postulate that energy exists in small discrete quantity or pockets or quantum necessitated a new branch of physics called quantum mechanics. In dealing with matter, matter is made up of a number of fundamental particles. Similarly energy is also made up of a small particle called quantum. Naturally , the mechanics that involve quantum and particles of matter cannot be the same as applied to macroscopic matter. The study of quantum and matter particles and their interaction is called quantum mechanics read less
Comments
Dislike Bookmark

Headstart to assured 95+ score in math

Please refer NCERT texts.
Comments
Dislike Bookmark

View 8 more Answers

Related Questions

How to understand physics concepts in a better manner?
Practical approach
Ravi Ranjan
1 0
7
Electromagnetism is the study of the effect caused by which one: A. moving electric charges B. stationary and moving electric charges C. stationary charges
B
Sugantha
What are the different integration methods ?
Log, Expo, Trigno, Laplacian, Parts etc.
Suman
The change in resistivity per unit original resistivity (or resistance) per degree change in temperature is called __________. (Resistance, Conductance, Temperature coefficient of resistivity, All of these)
Temperature coefficient of resistivity
Narendra Kumar
0 0
7
Why does Mercurous ion peculiarly exist as a dimer instead of monomer like a Mercuric ion?
After years of speculation of the nature of the mercury (I) ion, I've come to the following conclusion. Mercury (I) is a dimer consisting of a mercury (II) ion and a neutral mercury atom. There are...
Abdur Rahman W.
1 1
6

Now ask question in any of the 1000+ Categories, and get Answers from Tutors and Trainers on UrbanPro.com

Ask a Question

Related Lessons

Class 11- C++ (Classes and objects)
C++ has an advantage over C, which is the primary reason why C became obsolete. The concept of Object Orientation is the missing link which connects or enhances our programming approach more towards the...
P

Prachi Sharma

0 0
0
Find The Area Of Trapeziam ABCD
Question: Solution: Drop a perpendicular from C to AB 1/2 × 1/2 × 4 ×BC = 8 BC = 8sin 30° = 1/2 = h/ 4h = 2 Area => 1/ 2 × 2 = 14

Sujoy Das

2 0
0
Trigonometry

Manibhushan K.

0 0
0
Stationary point
Find the stationary point for the curve y = x3 – 3x2 + 3x – 3, and its type. y = x3 – 3x2 + 3x – 3 = 3x2 – 6x + 3 = 3(x2 – 2x + 1) = 3(x – 1)2 = 3(x –...

Sameer Ninawe

1 0
0
Integration by trig substitution
Let's solve one more trig problem using trig substitution. ∫ 5/√(x² - 5 ) dx as variable x precedes constant inside the radical sign we may have substitute x = √5 sec u Let x...

B.Sudhakar

3 0
0

Recommended Articles

Meet Swati, a Hindi Tutor from Bangalore

Swati is a renowned Hindi tutor with 7 years of experience in teaching. She conducts classes for various students ranging from class 6- class 12 and also BA students. Having pursued her education at Madras University where she did her Masters in Hindi, Swati knows her way around students. She believes that each student...

Read full article >

Meet Raghunandan.G.H, a B. Tech Tutor from...

Raghunandan is a passionate teacher with a decade of teaching experience. Being a skilled trainer with extensive knowledge, he provides high-quality BTech, Class 10 and Class 12 tuition classes. His methods of teaching with real-time examples makes difficult topics simple to understand. He explains every concept in-detail...

Read full article >

Meet Mohammad Wazid, a skilled trainer for...

Mohammad Wazid is a certified professional tutor for class 11 students. He has 6 years of teaching experience which he couples with an energetic attitude and a vision of making any subject easy for the students. Over the years he has developed skills with a capability of understanding the requirements of the students. This...

Read full article >

Meet Sandhya R, a B.Sc tutor from Bangalore

Sandhya is a proactive educationalist. She conducts classes for CBSE, PUC, ICSE, I.B. and IGCSE. Having a 6-year experience in teaching, she connects with her students and provides tutoring as per their understanding. She mentors her students personally and strives them to achieve their goals with ease. Being an enthusiastic...

Read full article >

Find Class 12 Tuition near you
Class 12 Tuition in Delhi
Class 12 Tuition in Bangalore
Class 12 Tuition in Hyderabad
Class 12 Tuition in Kolkata
Class 12 Tuition in Mumbai
Class 12 Tuition in Chennai
Class 12 Tuition in Pune
Class 12 Tuition in Jaipur
Class 12 Tuition in Lucknow
Class 12 Tuition in Noida
Online Tuition Class 12

Looking for Class 12 Tuition ?

Learn from the Best Tutors on UrbanPro

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you
X

Looking for Class 12 Tuition Classes?

The best tutors for Class 12 Tuition Classes are on UrbanPro

  • Select the best Tutor
  • Book & Attend a Free Demo
  • Pay and start Learning

Take Class 12 Tuition with the Best Tutors

The best Tutors for Class 12 Tuition Classes are on UrbanPro

This website uses cookies

We use cookies to improve user experience. Choose what cookies you allow us to use. You can read more about our Cookie Policy in our Privacy Policy

Accept All
Decline All

UrbanPro.com is India's largest network of most trusted tutors and institutes. Over 55 lakh students rely on UrbanPro.com, to fulfill their learning requirements across 1,000+ categories. Using UrbanPro.com, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 7.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more

ThinkVidya Learning Pvt Ltd © 2010-2024All Rights Reserved