- #1
ycheng18
- 9
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In our textbook, it says that the intensity of a double slit interference pattern stays the same if the slit width is negligible. I do not understand this concept.
As far as I am concerned, intensity should decrease as the circle of diffraction increase, as intensity is work per area, and the area is increasing as the circle increase but the amount of energy is not. When the interference pattern reaches a far spot, wouldn't the intensity of both waves drop to a low amount, and therefore by adding them up it is still not as bright?
P.S. I am still in high school, so, if possible, try to explain it with high school level material
As far as I am concerned, intensity should decrease as the circle of diffraction increase, as intensity is work per area, and the area is increasing as the circle increase but the amount of energy is not. When the interference pattern reaches a far spot, wouldn't the intensity of both waves drop to a low amount, and therefore by adding them up it is still not as bright?
P.S. I am still in high school, so, if possible, try to explain it with high school level material