def ca_to_h1h2(c, alpha):
    """
    Transform for power-2 law coefficients
    h1 = 1 - c*(1-0.5**alpha)
    h2 = c*0.5**alpha

    :param c: power-2 law coefficient, c
    :param alpha: power-2 law exponent, alpha

    returns: h1, h2

    """
    return 1 - c * (1 - 0.5 ** alpha), c * 0.5 ** alpha
