What you’ll learn9 learning objectivesChoose one objective for a focused lesson, or study the complete topic.3.2.2.1Terms normal, angle of incidence and• Define and use the terms normal, angle of incidence and angle of refractionSyllabus objective3.2.2.2An experiment to show refraction of• Describe an experiment to show refraction of light by transparent blocks of different shapesSyllabus objective3.2.2.3Passage of light through a transparent• Describe the passage of light through a transparent material (limited to the boundaries between two mediums only)Syllabus objective3.2.2.4Meaning of critical angle• State the meaning of critical angleSyllabus objective3.2.2.5Internal reflection and total internal• Describe internal reflection and total internal reflection using both experimental and everyday examplesSyllabus objective3.2.2.6Refractive index, n, as the ratio of• Define refractive index, n, as the ratio of the speeds of a wave in two different regionsSyllabus objective3.2.2.7Refractive index: n = sin i / sin r• Recall/use refractive index: n = sin i / sin rSyllabus objective3.2.2.8Critical angle relation: n = 1 / sin c• Recall/use critical angle relation: n = 1 / sin cSyllabus objective3.2.2.9Use of optical fibres, particularly in• Describe the use of optical fibres, particularly in telecommunicationsSyllabus objective