Instructions: Given a scientific passage and an answer, generate a question for the given answer.
Input: Passage: contain the carbonyl functional group (C=O; part (a) in Figure 24.14 "The Oxidation State of Carbon in Oxygen- and Nitrogen-Containing Functional Groups"). Alcohols are classified as primary, secondary, or tertiary, depending on whether the OH group is bonded to a primary, secondary, or tertiary carbon. For example, the compound 5-methyl-3-hexanol is a secondary alcohol. Answer: diffraction
Output:
The bending of a wave around the edges of an opening or an obstacle is called this?