finding different diffraction parameters

[AxolotlHere]

Describe your change:

**diffraction.py is a module used to calculate various parameters of single slit and double slit diffraction patterns such as
>>> checking if a given wavelength ,diffraction angle and slit width corresponds to the minimum intensity observed in the diffraction pattern.
>>> checking if a given wavelength ,diffraction angle and slit width corresponds to the minimum intensity observed in the diffraction pattern
>>> calculating the intensity of a fringe observed in a single slit diffraction pattern based on the slit width ,diffraction angle and wavelength.
>>> calculating the intensity of a fringe observed in a double slit diffraction pattern based on the path difference and the central maximum or the maximum intensity observed,
**

Checklist:

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized.
• I know that pull requests will not be merged if they fail the automated tests.
• This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
• All new Python files are placed inside an existing directory.
• All filenames are in all lowercase characters with no spaces or dashes.
• All functions and variable names follow Python naming conventions.
• All function parameters and return values are annotated with Python type hints.
• All functions have doctests that pass the automated testing.
• All new algorithms include at least one URL that points to Wikipedia or another similar explanation.
• If this pull request resolves one or more open issues then the description above includes the issue number(s) with a closing keyword: "Fixes #ISSUE-NUMBER".

[algorithms-keeper]

Click here to look at the relevant links ⬇️

🔗 Relevant Links

Repository:

• Contributing guidelines
• Project Euler solution guidelines

Python:

• Formatted string literals (f-strings)
• Type hints
• doctest
• unittest
• pytest

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[algorithms-keeper]

Please provide return type hint for the function: check_min_intensity. If the function does not return a value, please provide the type hint as: def function() -> None:

Please provide type hint for the parameter: slit_width

Please provide type hint for the parameter: diff_angle

Please provide type hint for the parameter: wavelength

[algorithms-keeper]

Please provide return type hint for the function: check_max_intensity. If the function does not return a value, please provide the type hint as: def function() -> None:

Please provide type hint for the parameter: slit_width

Please provide type hint for the parameter: diff_angle

Please provide type hint for the parameter: wavelength

[algorithms-keeper]

Please provide return type hint for the function: intensity_single_slit. If the function does not return a value, please provide the type hint as: def function() -> None:

Please provide type hint for the parameter: slit_width

Please provide type hint for the parameter: diff_angle

Please provide type hint for the parameter: wavelength

[algorithms-keeper]

Please provide return type hint for the function: intensity_double_slit. If the function does not return a value, please provide the type hint as: def function() -> None:

Please provide type hint for the parameter: path_diff

Please provide type hint for the parameter: intensity_max