Jane placed two bar magnets on her desk next to each other with like poles facing. She then sprinkled some iron filings around t
he magnets. Which of the following images best shows how the iron filings arranged themselves?
2 answers:
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Constructive interference happens when this condition is satisfied:
This means that the difference in the distance traveled by the waves, from the slit to the screen, is equal to the whole multiple of the wavelength.
If we say that the distance between two interference fringes is much smaller than the distance from the slit to the screen, we can use the following approximation:
Finally for the bright spots we have:
The spacing between bright spots is:
This means that the difference in the distance traveled by the waves, from the slit to the screen, is equal to the whole multiple of the wavelength.
If we say that the distance between two interference fringes is much smaller than the distance from the slit to the screen, we can use the following approximation:
Finally for the bright spots we have:
The spacing between bright spots is: