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Questions and Answers
What happens to the angle of incidence when light reflects off a surface?
What happens to the angle of incidence when light reflects off a surface?
- It is always 90 degrees.
- It becomes half of the angle of reflection.
- It is unequal to the angle of reflection.
- It is equal to the angle of reflection. (correct)
Which type of reflection is characterized by light scattering in many directions?
Which type of reflection is characterized by light scattering in many directions?
- Diffuse Reflection (correct)
- Specular Reflection
- Regular Reflection
- Total Reflection
What do we know about the virtual image formed by a plane mirror?
What do we know about the virtual image formed by a plane mirror?
- It is inverted upside down.
- It is of the same size as the object. (correct)
- It appears in front of the mirror.
- It is always larger than the object.
In the laws of reflection, what role does the 'normal' line play?
In the laws of reflection, what role does the 'normal' line play?
What is one application of reflection mentioned in the content?
What is one application of reflection mentioned in the content?
Flashcards
Angle of Incidence
Angle of Incidence
The angle at which light hits a surface.
Angle of Reflection
Angle of Reflection
The angle at which light bounces off a surface.
Normal
Normal
An imaginary line perpendicular to the surface where light reflects, dividing the incident and reflected rays.
Regular Reflection
Regular Reflection
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Diffuse Reflection
Diffuse Reflection
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Study Notes
Reflection of Light
- Reflection is the bouncing of light off a surface.
- Light changes direction when it hits a surface and bounces back.
- Reflection allows us to see objects.
Laws of Reflection
- First Law: The angle of incidence equals the angle of reflection.
- Second Law: The incident ray, reflected ray, and normal all lie in the same plane.
Types of Reflection
- Regular Reflection: Occurs on smooth surfaces (e.g., mirrors).
- Light reflects in a single, predictable direction.
- Diffuse Reflection: Occurs on rough surfaces (e.g., walls, paper).
- Light scatters in many directions, preventing clear images.
Image Formation
- When light reflects off a plane mirror, a virtual image is formed.
- The image is the same size as the object.
- The image is upright (erect).
- The image distance equals the object distance.
- The image appears behind the mirror.
Applications of Reflection
- Mirrors are used in many everyday items (makeup mirrors, car mirrors).
- Mirrors are also used in optical devices like telescopes.
- Mirrors are used in periscopes.
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