Physics help please....?

Question

I am not geting the PRINCIPAL OF SUPERPOSITION. First of all i want to know what is the 'super position of two waves' means...Secondly pls try to explain the principal of superposition.......

Answer 1

Two similar waves, i.e. sound,  when exactly superimposed, will double the wave height and depth but the velocity is constant. This means the sound doubles.

It happens in liquids, too.

Use your Internet to look it up.

Answer 2

two waves affecting a medium. Think air particles between 2 speakers.

The position of the medium is a combination of the two waves.

The waves are superimposed on each other to work out how the medium would look.

http://en.wikipedia.org/wiki/Superpositi...

check the diagrams half way down. They help to illustrate.

Answer 3

Superposition Principle

The principle of superposition states that if the world can be in any configuration, any possible arrangement of particles or fields, and if the world could also be in another configuration, then the world can also be in a state which is a mixture of the two, where the amount of each configuration that is in the mixture is specified by a complex number.

For example, if a particle can be in position A and position B, it can also be in a state where it is an amount "3i/5" in position A and an amount "4/5" in position B. To write this, people usually say:



In the description, only the relative size of the different components matter, and their angle to each other on the complex plane. This is usually stated by declaring that two states which are a multiple of one another are the same as far as the description of the situation is concerned.



The fundamental dynamical law of quantum mechanics is that the evolution is linear, meaning that if the state A turns into A' and B turns into B' after 10 seconds, then after 10 seconds the superposition ψ turns into a mixture of A' and B' with the same coefficients.

Examples

A particle can have any position, so that there are different states which have any value of the position x. These are written:



The principle of superposition guarantees that there are states which are arbitrary mixtures of all the positions with complex coefficients:



The sum is usually an integral, because space is continuous. The quantity ψ(x) is called the wavefunction of the particle.

If a particle can have some discrete orientations of the spin, say the spin can be aligned with the z axis  or against it , then the particle can have any state of the form:



If the particle has both position and spin, the state is a superposition of all possiblities for both:



The configuration space of a quantum mechanical system cannot be worked out without some physical knowledge. The input is usually the allowed different classical configurations, but without the duplication of including both position and momentum.

A pair of particles can be in any combination of pairs of positions. A state where one particle is at position x and the other is at position y is written . The most general state is a superposition of the possibilities:



The description of the two particles is much larger than the description of one particle--- it is a function in twice the number of dimensions. This is also true in probability, when the statistics of two random things are correlated. If two particles are uncorrelated, the probability distribution for their joint position P(x,y) is a product of the probability of finding one at one position and the other at the other position:



In quantum mechanics, two particles can be in special states where the amplitudes of their position are uncorrelated. For quantum amplitudes, the word entanglement replaces the word correlation, but the analogy is exact. A disentangled wavefunction has the form:



while an entangled wavefunction does not have this form. Like correlation in probability, there are many more entangled states than disentangled ones. For instance, when two particles which start out with an equal amplitude to be anywhere in a box have a strong attraction and a way to dissipate energy, they can easily come together to make a bound state. The bound state still has an equal probability to be anywhere, so that each particle is equally likely to be everywhere, but the two particles will become entangled so that wherever one particle is, the other is too.

Answer 4

http://www.wikipedia.org/

You will get all you need from here.