diff --git a/physics/diffraction.py b/physics/diffraction.py
new file mode 100644
index 000000000000..dc5ba9577321
--- /dev/null
+++ b/physics/diffraction.py
@@ -0,0 +1,106 @@
+import math
+
+
+def check_min_intensity(
+    slit_width: float = 1.0, diff_angle: float = 0.0, wavelength: float = 100.0
+) -> bool:
+    """
+    Checks for the condition of minimum intensity in a diffraction pattern.
+
+    Args:
+        slit_width (float): The width of the slit in millimeters.
+        diff_angle (float): The diffraction angle in radians.
+        wavelength (float): The wavelength of light in nanometers.
+
+    Returns:
+        bool: True if minimum intensity is met, otherwise False.
+
+    >>> check_min_intensity(4, 0.25, 300)
+    False
+    >>> check_min_intensity(1, 0.0001, 100)
+    True
+    """
+    wavelength *= 10**-6
+    n_val = round(slit_width * (diff_angle) / wavelength, 5)
+    r_val = n_val - math.floor(n_val) == 0
+    return r_val
+
+
+def check_max_intensity(
+    slit_width: float = 1.0, diff_angle: float = 0.0, wavelength: float = 100.0
+) -> bool:
+    """
+    Checks for the condition of maximum intensity in a diffraction pattern.
+
+    Args:
+        slit_width (float): The width of the slit in millimeters.
+        diff_angle (float): The diffraction angle in radians.
+        wavelength (float): The wavelength of light in nanometers.
+
+    Returns:
+        bool: True if maximum intensity is met, otherwise False.
+
+    >>> check_max_intensity(1, 0.001, 100)
+    False
+    >>> check_max_intensity(1, 0.00005, 100)
+    True
+    """
+    wavelength *= 10**-6
+    n_val = round(((2 * slit_width * diff_angle) - wavelength) / (2 * wavelength), 4)
+    r_val = n_val - math.floor(n_val) == 0
+    return r_val
+
+
+def intensity_single_slit(
+    slit_width: float = 1.0, diff_angle: float = 0.0, wavelength: float = 100.0
+) -> str:
+    """
+    Computes the intensity for a single slit diffraction pattern.
+
+    Args:
+        slit_width (float): The width of the slit in millimeters.
+        diff_angle (float): The diffraction angle in radians.
+        wavelength (float): The wavelength of light in nanometers.
+
+    Returns:
+        str: The intensity of the diffraction pattern.
+
+    >>> intensity_single_slit(1, 0.0005, 100)
+    '0.9999999999177533 I0'
+    """
+    beta = math.pi * slit_width * (math.sin(diff_angle) / wavelength)
+    i_coeff = (math.sin(beta) / beta) ** 2
+    return f"{i_coeff} I0"
+
+
+def intensity_double_slit(path_diff: int = 0, intensity_max: str | float = "I0") -> str:
+    """
+    Computes the intensity for a double slit diffraction pattern.
+
+    Args:
+        path_diff (float): The path difference in the two waves.
+        intensity_max (str or int): The maximum intensity.
+
+    Returns:
+        str or float: The intensity of the diffraction pattern.
+
+    >>> intensity_double_slit(0, 1)
+    '4.0'
+    >>> intensity_double_slit(0.001, 1)
+    '3.999999000000084'
+    >>> intensity_double_slit(0)
+    '4.0 I0'
+    """
+    r_val = (
+        str(4 * intensity_max * (math.cos(path_diff / 2)) ** 2)
+        if (type(intensity_max) is float or type(intensity_max) is int)
+        else f"{4*(math.cos(path_diff/2)**2)} I0"
+    )
+    return r_val
+
+
+if __name__ == "__main__":
+    import doctest
+
+    doctest.testmod()
+    # pass