What you’ll learn4 learning objectivesChoose one objective for a focused lesson, or study the complete topic.8.3.1The terms interference and coherence• understand the terms interference and coherenceSyllabus objective8.3.2Experiments that demonstrate two-source interference• show an understanding of experiments that demonstrate two-source interference using water waves in a ripple tank, sound, light and microwavesSyllabus objective8.3.3The conditions required if two-source interference fringes are to be• understand the conditions required if two-source interference fringes are to be observedSyllabus objective8.3.4Λ = ax / D for double-slit interference using light• recall and use λ = ax / D for double-slit interference using lightSyllabus objective