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Questions and Answers
What role does light play in our ability to see objects?
What role does light play in our ability to see objects?
Light enables us to see objects by entering our eyes either directly from the object or after being reflected off the object's surface.
What is the difference between the incident ray and the reflected ray?
What is the difference between the incident ray and the reflected ray?
The incident ray is the incoming ray of light that strikes a surface, while the reflected ray is the one that bounces off the surface after reflection.
In the described experiment, what happens when a ray of light encounters a plane mirror?
In the described experiment, what happens when a ray of light encounters a plane mirror?
When a ray of light encounters a plane mirror, it changes direction and produces a reflected ray traveling at an equal angle to the incident ray.
How is a comb used in the activity to demonstrate the laws of reflection?
How is a comb used in the activity to demonstrate the laws of reflection?
What types of surfaces are effective at reflecting light?
What types of surfaces are effective at reflecting light?
Flashcards
Reflection
Reflection
The process where light bounces off a surface, changing its direction.
Incident Ray
Incident Ray
The light ray that strikes a surface.
Reflected Ray
Reflected Ray
The light ray that bounces off a surface after reflection.
Plane Mirror
Plane Mirror
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Vision
Vision
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Study Notes
Light and Vision
- The sense of sight is crucial for observing the world.
- Objects are visible when light from them enters the eyes.
- Light can be emitted by the object or reflected off it.
- Polished surfaces (like mirrors) reflect light.
How to Observe Reflection
- Use a comb with one opening and a black paper strip to direct light.
- Hold the comb perpendicular to the paper.
- Shine a torch through the opening.
- Observe the reflected light path.
- Use a plane mirror to see the reflection.
Laws of Reflection
- The light ray striking a surface is called the incident ray.
- The light ray reflected from the surface is the reflected ray.
- The angle of incidence equals the angle of reflection.
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