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Questions and Answers
What is the radius of curvature of a plane mirror?
What is the radius of curvature of a plane mirror?
What is the orientation of the image formed by a plane mirror?
What is the orientation of the image formed by a plane mirror?
What is the size of the image formed by a plane mirror compared to the object?
What is the size of the image formed by a plane mirror compared to the object?
What happens to the left and right sides of the object in the image formed by a plane mirror?
What happens to the left and right sides of the object in the image formed by a plane mirror?
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What is the purpose of a ray diagram in the context of a plane mirror?
What is the purpose of a ray diagram in the context of a plane mirror?
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What is true about the angle of incidence and the angle of reflection in a plane mirror?
What is true about the angle of incidence and the angle of reflection in a plane mirror?
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What is the type of image formed by a plane mirror?
What is the type of image formed by a plane mirror?
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What is the main characteristic of the reflection of light by a plane mirror?
What is the main characteristic of the reflection of light by a plane mirror?
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What is the nature of the image formed by a plane mirror?
What is the nature of the image formed by a plane mirror?
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What is the distance of the image from the mirror compared to the distance of the object from the mirror?
What is the distance of the image from the mirror compared to the distance of the object from the mirror?
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What is the formula that relates the object distance, image distance, and focal length of a plane mirror?
What is the formula that relates the object distance, image distance, and focal length of a plane mirror?
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What is one of the scientific applications of plane mirrors?
What is one of the scientific applications of plane mirrors?
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What is a common use of plane mirrors in daily life?
What is a common use of plane mirrors in daily life?
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Study Notes
Plane Mirror
Characteristics
- A plane mirror is a flat, smooth surface that reflects light
- It is a type of spherical mirror with an infinite radius of curvature
- The mirror's surface is perpendicular to the incident light rays
Image Formation
- When light rays from an object fall on a plane mirror, they are reflected back to form an image
- The image formed by a plane mirror is:
- Virtual (cannot be projected on a screen)
- Upright (same orientation as the object)
- Same size as the object
- Laterally inverted (left and right sides are swapped)
Mirror Formula
- Not applicable to plane mirrors since the radius of curvature is infinite
Ray Diagrams
- Used to illustrate the formation of images in plane mirrors
- Consist of:
- Incident rays from the object
- Reflected rays from the mirror
- Image formed by the intersection of reflected rays
Applications
- Used in:
- Everyday applications (e.g., dressing mirrors, rearview mirrors)
- Scientific instruments (e.g., telescopes, spectrometers)
- Optical systems (e.g., periscopes, laser systems)
Important Concepts
- Angle of incidence = Angle of reflection
- The normal to the mirror surface bisects the angle between the incident and reflected rays
Plane Mirror
Characteristics
- Has a flat, smooth surface that reflects light
- Is a type of spherical mirror with an infinite radius of curvature
- Its surface is perpendicular to incident light rays
Image Formation
- Light rays from an object are reflected back to form a virtual image
- The image is upright and same size as the object, but laterally inverted
- The image cannot be projected on a screen
Mirror Formula
- There is no mirror formula applicable to plane mirrors due to infinite radius of curvature
Ray Diagrams
- Used to illustrate image formation in plane mirrors
- Consist of incident rays, reflected rays, and the image formed by the intersection of reflected rays
Applications
- Used in everyday applications like dressing mirrors and rearview mirrors
- Used in scientific instruments like telescopes and spectrometers
- Used in optical systems like periscopes and laser systems
Important Concepts
- Angle of incidence is equal to angle of reflection
- The normal to the mirror surface bisects the angle between incident and reflected rays
Plane Mirror
Definition and Characteristics
- A flat, smooth, and polished surface that reflects light without changing its direction or magnitude
- Reflects light without changing its direction or magnitude
- Forms a virtual image, which appears to be behind the mirror
- Laterally inverts the image, meaning left becomes right and right becomes left
- Produces an image of the same size as the object
- The distance of the image from the mirror is the same as the distance of the object from the mirror
Image Formation
- Object distance is the distance between the object and the mirror
- Image distance is the distance between the mirror and the image
- Mirror formula: 1/f = 1/do + 1/di, where f is infinity for a plane mirror
Uses of Plane Mirrors
- Commonly used in daily life for personal grooming, decoration, and other purposes
- Used in various scientific instruments, such as telescopes, spectroscopes, and lasers
- Used in optical instruments, such as periscopes, binoculars, and cameras
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Description
Learn about the characteristics and image formation of plane mirrors, including their smooth surface, infinite radius of curvature, and properties of the formed image.
