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Questions and Answers
What type of reflection occurs when light is reflected from a smooth surface?
What type of reflection occurs when light is reflected from a smooth surface?
How does light behave when it travels from a rarer medium to a denser medium?
How does light behave when it travels from a rarer medium to a denser medium?
Which of the following is an example of diffused reflection?
Which of the following is an example of diffused reflection?
What is the bending of light as it passes through different media called?
What is the bending of light as it passes through different media called?
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Which of the following best describes a denser medium?
Which of the following best describes a denser medium?
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What role does the angle of incidence play in the behavior of light?
What role does the angle of incidence play in the behavior of light?
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Which statement about light traveling through a vacuum is true?
Which statement about light traveling through a vacuum is true?
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What happens in regular reflection compared to diffused reflection?
What happens in regular reflection compared to diffused reflection?
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What happens to light when it travels from air to glass?
What happens to light when it travels from air to glass?
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Which of the following statements best describes optically denser media?
Which of the following statements best describes optically denser media?
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Which medium is considered to be optically rarer?
Which medium is considered to be optically rarer?
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When light exits glass and enters air, what change occurs?
When light exits glass and enters air, what change occurs?
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What is the primary reason light travels slower in denser materials?
What is the primary reason light travels slower in denser materials?
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What is the result of refraction when light moves from denser to rarer media?
What is the result of refraction when light moves from denser to rarer media?
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In which of the following scenarios does light travel faster?
In which of the following scenarios does light travel faster?
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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: The bending of light as it passes from one medium to another.
- Angle of incidence: The angle between the incident ray and the normal line.
- Angle of refraction: The angle between the refracted ray and the normal line.
- Diffused: Light reflected in many directions from a rough surface.
- Regular: Light reflected in a single direction from a smooth surface.
Starter Activity
- Discuss the differences between two images depicting light reflection on different surfaces.
Regular Reflection
- Light bounces off a smooth surface in a uniform/single direction.
- Examples include mirrors, polished metals, calm water, CDs, and DVDs.
Diffused Reflection
- Light bounces off a rough surface in many directions.
- Examples include walls, wood, irregular objects (bags, books, paper, people, etc.).
Day 2 - Light Refraction
- Objectives: Draw and label a refraction diagram, define denser and rarer mediums, explain how light travels from a rarer medium to a denser medium (and vice versa), compare and contrast denser and rarer mediums.
Vocabulary
- Rarer media: Mediums that allow light to travel faster, where particles are further apart.
- Denser media: Mediums that allow light to travel slower, where particles are closer together.
Previous Knowledge:
- Light travels at different speeds in different materials. Solid > Liquid > Gas > Vacuum.
Which is Denser/Thicker?
- Glass is optically denser than air. Light travels slower in glass.
Checking Understanding
- Describe light refraction observed in the classroom. Analyze speed, bending, and the denser/rarer mediums involved.
When Light Travels From:
- Optically rare to optically denser: Light slows down and bends TOWARDS the normal.
- Optically denser to optically rarer: Light speeds up and bends AWAY from the normal.
Think Pair Share - Check Your Understanding
- Choose the correct sketch demonstrating interface, normal line, incident ray, and reflected rays.
Group Work - Practice Drawing (Peer Evaluation)
- Draw reflected light in diagrams.
- Exchange papers with another group.
- Evaluate each other's work using provided answer keys.
- Post work on the bulletin board.
Compare Denser and Rarer Media
- Denser media: Light travels slower, particles closer.
- Rarer media: Light travels faster, particles further apart.
Activity - Quizizz
- Participate in an online quiz using the provided link.
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Description
This quiz covers the concepts of regular and diffused reflection, refraction, and the behavior of waves in different materials. Students will define key vocabulary, label ray diagrams, and explain the processes involved in light reflection and refraction. Test your understanding of these foundational physics principles.
