(self)
return self[0]
The distance from the optical axis.

        Examples
        ========

        >>> from sympy.physics.gaussopt import GeometricRay
        >>> from sympy import symbols
        >>> h, angle = symbols('h, angle')
        >>> gRay = GeometricRay(h, angle)
        >>> gRay.height
        h
The distance from the optical axis.
The distance from the optical axis .
def height(self):
        """
        The distance from the optical axis.

        Examples
        ========

        >>> from sympy.physics.gaussopt import GeometricRay
        >>> from sympy import symbols
        >>> h, angle = symbols('h, angle')
        >>> gRay = GeometricRay(h, angle)
        >>> gRay.height
        h
        """
        return self[0]
def height ( self ) : return self [ 0 ]