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Questions and Answers
Which statement about the laws of reflection is true?
What is the term for the angle formed between the incident ray and the normal at the point of incidence?
If a light ray is incident normally on a plane mirror, what will be the angle of reflection?
In the context of image formation, what distinguishes a real image from a virtual image?
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Which plane is formed by the incident ray and the normal?
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What type of image is formed by a convex mirror?
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Which of the following statements about a plane mirror is incorrect?
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What happens to light rays reflecting off a surface that creates a virtual image?
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What is the main purpose of reflection of light in our daily lives?
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Which of the following describes irregular reflection?
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What is the incident ray?
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In which situation is regular reflection most likely to occur?
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What happens to light rays when they strike a rough surface?
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Why can we see objects around us even from different angles?
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What is the point of incidence?
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Which type of reflection would occur on a non-polished, ordinary surface?
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Study Notes
Reflection of Light
- Light returns to its original medium after striking a surface
- Some light may also be absorbed or transmitted depending on the surface
- We see objects because light reflects off them and enters our eyes
Kinds of Reflection
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Regular reflection: Occurs when a beam of light strikes a smooth, polished surface like a plane mirror.
- The reflected beam is parallel and in a fixed direction
- Can only be seen from a specific direction
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Irregular reflection: Occurs when light strikes a rough or uneven surface like a wall or book page
- Light reflects in different directions at different points on the surface
- Creates diffused or irregular reflection
- Can be seen from anywhere
Terms Related to Reflection
- Incident ray: The light ray striking a reflecting surface
- Point of incidence: The point where the incident ray strikes the reflecting surface
- Reflected ray: The light ray that bounces off the surface, traveling back into the same medium as the incident ray
- Normal: A line drawn perpendicular to the reflecting surface at the point of incidence
- Angle of incidence: The angle between the incident ray and the normal
- Angle of reflection: The angle between the reflected ray and the normal
- Plane of incidence: The plane containing the incident ray and the normal
- Plane of reflection: The plane containing the reflected ray and the normal
Laws of Reflection
- The angle of incidence (i) is equal to the angle of reflection (r)
- The incident ray, the reflected ray, and the normal at the point of incidence all lie in the same plane
Reflection of a Ray of Light Normally Incident on a Plane Mirror
- When a ray of light is incident normally (i = 0°), the angle of reflection is also 0° (r = 0°)
- The light ray retraces its path
Formation of Images by Reflection
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Real image: Can be obtained on a screen, is inverted, formed when light rays actually intersect after reflection.
- Example: the image of a distant object formed by a concave mirror is a real image
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Virtual image: Cannot be obtained on a screen, is erect, formed when light rays after reflection appear to diverge from the image.
- Example: the image of an object formed by a plane mirror or a convex mirror is a virtual image
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How we see virtual images: Divergent rays from the image enter our eyes and converge on our retina, creating the image we see.
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Description
This quiz explores the fundamental concepts of reflection of light, including regular and irregular reflection. Understand how light interacts with surfaces, and the terminology associated with this phenomenon. Perfect for students studying optics and light behavior.