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Light Basics and Behavior

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Light Basics and Behaviour

Light rays and reflection diagram

🔦 Part 1: Light Terminology Challenge

1. What is light?

A type of matter

A form of energy

A solid particle

A liquid wave

2. How does light travel?

In curved lines

In zigzag patterns

In straight lines

In spirals

3. Fill in the blanks using the key terms below:

Key terms: reflection, refraction, absorption, transmission, light ray

a) A narrow beam of light is called a ________________

b) When light bounces off a mirror, this is called ________________

c) When light bends as it passes through glass, this is called ________________

d) When light passes through a clear window, this is called ________________

e) When light is taken in by a black surface, this is called ________________

🔬 Part 2: Practical Observations

4. During your mirror experiment, draw and label what happens to the light ray:

Label: incident ray, reflected ray, mirror, normal line

5. What did you observe when light passed through the plastic block?
6. Explain why the light ray changes direction when it enters the plastic block:

📝 Part 3: Exam Practice & Extension

7. CCEA Style Question: A student shines a torch at a plane mirror. The light hits the mirror at an angle of 30° to the normal.

a) What is the angle of reflection? ________°

b) State the law of reflection:

8. Extension Challenge: How might the behaviour of light explain why we see rainbows? Use the terms refraction and white light in your answer.
9. Real-World Application: Explain why car headlights use curved reflectors behind the bulb:

🎯 Success Criteria Check

Tick when you can do each:

I can define key light terms accurately

I can explain how light travels and behaves

I can relate practical observations to theory

I can answer exam-style questions with confidence

10. Write one question about light that you'd like to investigate next lesson:

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