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Questions and Answers
What happens to light as it transitions from air to glass?
What happens to light as it transitions from air to glass?
Which statement accurately compares the behavior of light in denser versus rarer media?
Which statement accurately compares the behavior of light in denser versus rarer media?
Which of the following statements is true regarding glass and air?
Which of the following statements is true regarding glass and air?
In which situation would light travel fastest?
In which situation would light travel fastest?
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How does light behave when moving from glass to air?
How does light behave when moving from glass to air?
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What type of reflection occurs when light bounces off a smooth surface in a uniform direction?
What type of reflection occurs when light bounces off a smooth surface in a uniform direction?
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Which scenario best explains what happens during refraction?
Which scenario best explains what happens during refraction?
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What is the primary difference between a denser medium and a rarer medium?
What is the primary difference between a denser medium and a rarer medium?
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Which of the following best describes diffused reflection?
Which of the following best describes diffused reflection?
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What is the angle of refraction associated with light passing from a rarer to a denser medium?
What is the angle of refraction associated with light passing from a rarer to a denser medium?
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In a ray diagram, what does a refracted ray represent?
In a ray diagram, what does a refracted ray represent?
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Which material is an example of a denser medium?
Which material is an example of a denser medium?
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What factor primarily causes the bending of light during refraction?
What factor primarily causes the bending of light during refraction?
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Study Notes
Waves and Their Applications
- Unit 1 - Module L
- Standard MS-PS4-2: Develop and use a model to describe that waves are reflected, absorbed, or transmitted through various materials.
Day 1 - Regular & Diffused Reflection/Refraction
- Objectives:
- Define regular and diffused reflection
- Define refraction
- Label reflected and refracted ray diagrams
- Explain how refraction takes place
- Compare regular and diffused reflection
- Vocabulary:
- Refraction
- Angle of incident
- Angle of refraction
- Diffused
- Regular
Regular Reflection
- Light bounces off a smooth surface and reflects in a uniform/single direction.
- Examples: mirrors, polished metals, calm water, CDs, DVDs
Diffused Reflection
- Light bounces off a rough surface and reflects in different/multiple directions.
- Examples: walls, wood, irregular objects (bags, books, papers, people)
Starter Activity
- What is the difference between the provided pictures? (Two diagrams showing light reflection)
Refraction
- Light changes direction as it passes from one medium to another.
- Matter can refract light
From the Video About Refraction:
- What bends light that passes through the prism? (The prism bends light)
- What is refraction? (Change in direction of light as it passes from one medium to another)
Labeling Parts of Refraction Diagram
- Incident ray
- Normal
- Angle of incidence
- Boundary
- Substance 1
- Substance 2
- Angle of refraction
- Refracted ray
Label C and D
- C - Incident ray
- D - Refracted ray
Day 2 - Light Refraction
- Objectives:
- Draw and label refraction diagrams
- Define denser and rarer medium
- Explain how light travels as it passes from a rarer medium to a denser medium, and vice versa
- Compare and contrast denser and rarer medium
- Vocabulary:
- Rarer media
- Denser media
Starter activity:
- Label the ray diagram to show refraction and reflection of light. (Diagram is provided)
Previous Knowledge:
- Light travels slower in denser/thicker materials (solid > liquid > gas > vacuum)
Comparing Denser and Rarer Media:
- Denser media: Light travels slowly, particles are closer together
- Rarer media: Light travels faster, particles are further apart.
Checking Understanding:
- Describe any refraction of light seen in your classroom. (Describe speed, bends, denser/rarer medium)
When Light Travels From...
- Optically rare to optically denser (slower): Light bends towards the normal (e.g., from air to glass)
- Optically denser to optically rarer (faster): Light bends away from the normal (e.g., from glass to air)
Think Pair Share Check Your Understanding (Activity)
- Choose the correct sketch of the refractive situation between the media (interface, normal line, incident ray, reflected rays to the right) Three diagrams are provided
Group Work (Peer Evaluation)
- Draw the reflected light in diagrams below.
- Exchange your paper with another group.
- Evaluate each other's work by the teacher's answer key
- Post your work on the bulletin board (There are diagrams given as examples)
Activity - Quizizz:
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Description
Explore the principles of regular and diffused reflection and how refraction occurs. This quiz will assess your understanding of wave behavior as it moves through various materials. Get ready to label ray diagrams and compare different types of reflection!
