The uncertainty principle arises from a common-sense idea: To measure something, you must affect it somehow....

For this discussion, you’ll think through some other situations involving the uncertainty principle.

In your initial discussion post, address the following:

When you shine a light on an object, the momentum from the photons that make up that light impacts the object. For macroscopic objects, this will have no measurable effect. Describe why this is different for atomic-sized objects.
Suppose you shine a very long wavelength light on one electron and a very short wavelength light on another electron. What differences will you observe?
Why does shining very short wavelength photons on an electron not tell you exactly where the electron is?
Describe two other examples of situations in which measuring something about an object somehow changes it.

Solutions

Expert Solution

Answer of first part:- since photon is very small particle of light and energy of single photon is very less as we calculte using plank formula.so it does not affect the macroscopic object but for atomic sized object this small amount of enrrgy can make huge difference. You can think in terms of Bohr theory where very small amount of energy makes transition of electrons from one orbit to another.

Answer of second part:-For very long wavelength of light its energy is very low but for very short wavelngth of light ,energy is very high according to formula of plank.so short wave length having more energy affect the electrons parameter such as energy ,speed etc more intensely but long wavelngth having less amount of energy do the same thing but in a very little manner.

Answer to part 3:-According to Heisenberg's uncertainty principle we can say that the short wavelngth photon have very high energy and when we use this to measure the position of electron, this high energy photons transfer its energy to electron by absorbing this energy electrons change its velocity and energy and elctron goes into different orbit. So we cannot measure correctly the position of elctron by using high energy photon.

Answer of part4:-Quantum tunneling and Quantum double alit experiment.

genius_generous answered 2 years ago

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