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Light is emitted due to the de-excitaton of electrons from higher orbits of the various atoms of the light source.The de-excitation can also be to different levels in different atoms resulting in emission of different wavelengths.A light source will have numerous atoms in it.When you take two light sources it is not possible for all the atoms to get de-excited to the same shell at the same time(causing phase difference) that is why two independent sources cannot be coherent.
What else can I help you with?
What is characteristics of current source?
The characteristic of the current sources is that it cannot operate in an pen circuit.
Is it true that if you cannot write papers for your life you are not an engineer?
There is no correlation. It is true in some cases and false in others. Trust me ... During my so-called career in that profession, I have encountered a substantial population of engineers none of whom could write two coherent sentences to save his life, let alone a 'paper'.
What energy sources might not be available in 2050?
It cannot be known for certain what will and will not be available in 2050. Speculation suggests at the present rate some fossil fuels will be almost exhausted and we may or may not have fusion power. Some form of fission will be available as will solar and other renewable sources.
What goes up the chimney down but can't go doen the chimney up?
The answer to the riddle is "an umbrella." When an umbrella is closed, it can go up the chimney, but when it's open, it cannot go down the chimney. This playful riddle highlights the differences in how objects behave based on their position or configuration.
How do you use the make tool in Unix?
This is an extremely complex topic that cannot be answered here. You need to learn how to create dependency rules in the 'make' language. Suggested sources include the O'Reilly books on 'make'.
Is poly chromatic light can be coherent?
Coherent light (like a laser) is a single frequency. Polychromatic light is, by definiation, multiple frequencies and cannot be coherent.
How does writing help you in law?
If you don't know how to write a coherent argument, you cannot win your cases!
Why two distant flash lights do not produce interference fringes?
Interference fringes are produced when waves from separate sources overlap and interfere with each other. In the case of two distant flashlights, the waves emitted by each flashlight do not overlap significantly at a distance, so interference fringes are not observed. Additionally, the coherence length of the light emitted by the flashlights may be too low to produce visible interference fringes at a long distance.
What is the most important thing that a plant cannot do?
it has no independent locomotion - it cannot move by itself
What is independent paragraph?
A Paragraph that cannot stand on its own.
Which one cannot stand alone as a sentence independent clause or independent clause?
Only an independent clause can stand independently. A dependent clause is dependent on an independent clause.
When should you question a credibility?
When you cannot find any other sources that supports its arguments.
How can incandescent light be made coherent?
Theoretically it cannot as destructive interference between incoherant wave trains occur (i.e. photons are released spontaneously)
What is the opposite and same of incoherent?
well, some opposites are 'clear' and 'articulate(d)' also 'coherent' and 'llegible'. The same...hm..I'm not sure but maybe some already listed antonyms may help. My apoligies in that I cannot answer your question completely.
What can life teach us that school cannot?
how to make money, how to be independent
Independent and dependent are types of what?
Independent and dependent are types of variables. These variables are used mostly in science and math. When using independent variables you can control them dependent variables you cannot.
What is the only state that's an independent republic?
A state cannot be an independent republic and also part of the United States.If you are asking, "What is the only state that was oncean independent republic",the answer is "Texas".
