The answer to the question is sound
Answer:
The detailed explanations is attached below
Explanation:
What is applied is the De brogile equation and the equation showing a relationship between Energy, speed of light and wavelength.
The explanation is as attached below.
Answer:
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The magnetic field is a field of magnetism that is in constant contact with everything and it is stronger at the poles of the earth. compasses point towards magnetic north which is a few miles away from true North. refrigerator magnets are much much stronger then the magnetic field so that is why they stick to metal. I do not know what the domain theory is.