A complete, ready-to-teach lesson for Unit 1 (Principles and Applications of Science I), physics section: the critical angle and the conditions for total internal reflection.
Learning objectives:
- State the two conditions for total internal reflection.
- Define the critical angle.
- Calculate critical angles using sin C = 1/n and sin C = n2/n1.
- Explain applications of total internal reflection, such as prisms and diamonds.
What’s included:
- Student worksheet (PDF and editable Word)
- Teacher version with model answers and mark schemes (PDF and editable Word)
- Teacher notes: lesson flow, common misconceptions and practical/safety notes
- Retrieval starter (5 marks)
- Structured tasks with key-idea boxes and clear diagrams
- Check for Understanding quiz (10 marks) with a confidence self-assessment
- Exam-style practice (15 marks), ending with a levels-marked 6-mark question with indicative content
Specification coverage:
- C2 - Total internal reflection: the critical angle and the conditions for TIR; sin C = 1/n.
About 60 minutes of teaching; the exam-style section works in class or as homework. All questions are original.
Written for the Pearson BTEC Level 3 Nationals in Applied Science. Not endorsed by Pearson. Single-school licence.
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£3.00