- #1
Decimal
- 75
- 7
Homework Statement
This problem concerns a single slit diffraction experiment where Fraunhofer diffraction is observed on an observing screen via a positive converging lens with focal distance f. The diffraction pattern has a central maximum of width dy, and the vacuum wavelength of the light is lambda.The attempt at a solution
The first problem was to find the slit width of this experiment of this experiment with the above data. I was able to solve this fine, by finding the position of the spots where the irradiance of the light becomes zero and then solving for the slit width.
However the second part of the question asks me to assume the the slit width as a given quantity b, and then calculate the "maximum order number for irradiance nulls". I don't really understand the question here. Is there a maximum order number? Don't the irradiance nulls just repeat forever (theoretically)? Because I don't really understand the question I also don't know where to start. Could somebody give me some pointers?
Thanks!
This problem concerns a single slit diffraction experiment where Fraunhofer diffraction is observed on an observing screen via a positive converging lens with focal distance f. The diffraction pattern has a central maximum of width dy, and the vacuum wavelength of the light is lambda.The attempt at a solution
The first problem was to find the slit width of this experiment of this experiment with the above data. I was able to solve this fine, by finding the position of the spots where the irradiance of the light becomes zero and then solving for the slit width.
However the second part of the question asks me to assume the the slit width as a given quantity b, and then calculate the "maximum order number for irradiance nulls". I don't really understand the question here. Is there a maximum order number? Don't the irradiance nulls just repeat forever (theoretically)? Because I don't really understand the question I also don't know where to start. Could somebody give me some pointers?
Thanks!