Questions and Answers
What phenomenon occurs when a light ray bounces off an object?
Reflection
According to the Law of Reflection, how are the angle of incidence and the angle of reflection related?
They are equal.
What type of reflection occurs on smooth, shiny surfaces?
Clear reflection.
What is the primary difference between a real image and a virtual image?
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How does a periscope utilize reflection?
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What is the outcome of diffuse reflection on rough surfaces?
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What type of mirror is commonly used in homes for personal reflection?
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Why are high-visibility strips reflective and important for cyclists?
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Study Notes
Reflection Basics
- Reflection occurs when light bounces off an object.
- Key components in reflection: incident ray, reflected ray, and normal (the perpendicular line to the surface at the point of incidence).
The Law of Reflection
- The angle of incidence is equal to the angle of reflection.
- This principle states that light reflects off a surface at the same angle it arrives.
Types of Reflection
- Clear Reflection: Occurs on smooth, shiny surfaces, producing sharp and clear images.
- Diffuse Reflection: Happens on rough, dull surfaces, scattering light in many directions and preventing the formation of clear images.
Plane Mirrors
- Plane mirrors have a flat reflective surface, commonly found in homes and bathrooms.
- They produce virtual images, which appear behind the mirror without light rays passing through them.
Real vs. Virtual Images
- A real image is formed when light rays converge and pass through it.
- A virtual image is created when light rays do not pass through; for example, a reflected image in a mirror appears inverted but does not exist as a physical image.
Applications of Reflection
- Reflection is useful in safety equipment like high-visibility strips for cyclists, enhancing visibility in low-light conditions.
- A periscope employs reflection through two plane mirrors positioned at 45° angles, allowing viewers to see objects not directly in their line of sight by reflecting light at right angles.
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Description
Test your understanding of the basics of reflection, including key concepts like the law of reflection and types of reflection. Explore how plane mirrors create virtual images and differentiate between real and virtual images.
