text: A formula which describes this phenomenon is obtained by approximating the Kirchhoff integral theorem with Kirchhoff's boundary conditions.
full_question: A formula which describes this phenomenon is obtained by approximating the Kirchhoff integral theorem with Kirchhoff's boundary conditions. The angular resolution of this phenomenon can be estimated by the formula "1.22 times lambda over D", which is the Rayleigh criterion. This phenomenon occurs due to every point on a wave front acting as a source for secondary spherical waves which interfere with each other. This phenomenon is explained by Huygens' principle. With interference, it causes the dark fringes that appear when light passes through a slit. For 10 points, name this phenomenon in which light bends around an obstacle.
first_sentence: A formula which describes this phenomenon is obtained by approximating the Kirchhoff integral theorem with Kirchhoff's boundary conditions.
raw_answer: diffraction