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What happens when a ray of light passes through the center of curvature of a concave mirror?
What happens when a ray of light passes through the center of curvature of a concave mirror?
The image formed by an object positioned at infinity in front of a concave mirror is virtual and upright.
The image formed by an object positioned at infinity in front of a concave mirror is virtual and upright.
False
What are the properties of the image formed when the object is positioned between infinity and the center of curvature in a concave mirror?
What are the properties of the image formed when the object is positioned between infinity and the center of curvature in a concave mirror?
Diminished, real, and inverted.
When an object is placed at the center of curvature (c), the reflected rays intersect at point ______.
When an object is placed at the center of curvature (c), the reflected rays intersect at point ______.
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Match the positions of the object with their respective image properties:
Match the positions of the object with their respective image properties:
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What is the essential characteristic of rays that are incident to the concave mirror and parallel to the principal axis?
What is the essential characteristic of rays that are incident to the concave mirror and parallel to the principal axis?
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Any incident ray that is not parallel to the principal axis will not follow the law of reflection.
Any incident ray that is not parallel to the principal axis will not follow the law of reflection.
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What is the focal point (f) of a concave mirror?
What is the focal point (f) of a concave mirror?
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What is the sign convention for distances measured to the left of the mirror pole?
What is the sign convention for distances measured to the left of the mirror pole?
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The mirror formula can only be applied to concave mirrors.
The mirror formula can only be applied to concave mirrors.
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What does the magnification formula relate to in a concave mirror?
What does the magnification formula relate to in a concave mirror?
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In the magnification formula, 'm' represents _____ of the image compared to the object.
In the magnification formula, 'm' represents _____ of the image compared to the object.
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Match the terms related to spherical mirrors with their corresponding definitions:
Match the terms related to spherical mirrors with their corresponding definitions:
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What is the term used to describe the point in the center of a spherical mirror that has the same tangent and curvature?
What is the term used to describe the point in the center of a spherical mirror that has the same tangent and curvature?
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The radius of curvature is the distance between the focal point and the mirror's pole.
The radius of curvature is the distance between the focal point and the mirror's pole.
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What type of image is formed when light rays actually intersect after reflection?
What type of image is formed when light rays actually intersect after reflection?
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The point from which reflection of light actually occurs in a mirror is known as the ______.
The point from which reflection of light actually occurs in a mirror is known as the ______.
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Match the following terms with their correct definitions:
Match the following terms with their correct definitions:
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Which of the following best describes a virtual image?
Which of the following best describes a virtual image?
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The principal axis is an imaginary line passing through the optical center and the center of curvature.
The principal axis is an imaginary line passing through the optical center and the center of curvature.
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How does a concave mirror form images?
How does a concave mirror form images?
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Concave mirrors are used in devices like ______ to focus light.
Concave mirrors are used in devices like ______ to focus light.
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Match the following types of mirrors to their characteristics:
Match the following types of mirrors to their characteristics:
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What type of image is formed when an object is placed between the pole and the principal focus of a concave mirror?
What type of image is formed when an object is placed between the pole and the principal focus of a concave mirror?
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Images formed by concave mirrors when the object is beyond the center of curvature are always real and inverted.
Images formed by concave mirrors when the object is beyond the center of curvature are always real and inverted.
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What is the significance of the principal focus in mirror optics?
What is the significance of the principal focus in mirror optics?
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The two rays diverging from an object in front of a concave mirror will appear to intersect at a point called the ______.
The two rays diverging from an object in front of a concave mirror will appear to intersect at a point called the ______.
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Match the following image characteristics with their corresponding mirror scenarios:
Match the following image characteristics with their corresponding mirror scenarios:
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Which ray path is correctly described when an object is placed between the pole and infinity in front of a concave mirror?
Which ray path is correctly described when an object is placed between the pole and infinity in front of a concave mirror?
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The distance from the object to the mirror is always equal to the distance from the image to the mirror.
The distance from the object to the mirror is always equal to the distance from the image to the mirror.
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What is the formula used for calculating distances in mirror optics?
What is the formula used for calculating distances in mirror optics?
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According to the New Cartesian Sign Convention, the object is always placed on the ______ side of the mirror.
According to the New Cartesian Sign Convention, the object is always placed on the ______ side of the mirror.
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Match the following sign conventions with their descriptions:
Match the following sign conventions with their descriptions:
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What type of image is always formed by a plane mirror?
What type of image is always formed by a plane mirror?
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The angle of incidence is equal to the angle of reflection when light strikes a mirror.
The angle of incidence is equal to the angle of reflection when light strikes a mirror.
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What is the virtual image formed by a plane mirror in relation to the object?
What is the virtual image formed by a plane mirror in relation to the object?
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The angle made by the incident ray and the reflective surface is called the angle of __________.
The angle made by the incident ray and the reflective surface is called the angle of __________.
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Match the following terms with their descriptions:
Match the following terms with their descriptions:
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In the ray diagram for a plane mirror, if a ray is drawn from point A to the mirror at point P, what happens to that ray?
In the ray diagram for a plane mirror, if a ray is drawn from point A to the mirror at point P, what happens to that ray?
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The angle made by the reflected ray and the surface equals the angle made by the incident ray and the surface.
The angle made by the reflected ray and the surface equals the angle made by the incident ray and the surface.
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What happens to rays of light that diverge after reflection from a plane mirror?
What happens to rays of light that diverge after reflection from a plane mirror?
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The angle made by the incident and reflected rays is equal to __________ degrees.
The angle made by the incident and reflected rays is equal to __________ degrees.
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When drawing a ray diagram for a concave mirror, which characteristic do the incident rays exhibit?
When drawing a ray diagram for a concave mirror, which characteristic do the incident rays exhibit?
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Study Notes
Reflection of Light
- Light reflects off of objects (polished, smooth, shiny)
- Reflection is the bouncing back of light rays from an object
- Light travels in straight lines. This allows us to see the world around us
- Reflection allows us to see things based on the property that light travels in a straight line, this includes twinkling of stars or light reflected by a mirror
Laws of Reflection
- Incident ray, normal and reflected ray all lie in the same plane
- Angle of incidence is equal to the angle of reflection
Types of Reflection
- Specular/Regular Reflection: Reflection from smooth surfaces creates a clear reflected image. Rays reflect at a definitive angle. Occurs with smooth surfaces.
- Diffuse/Irregular Reflection: Reflection from rough surfaces scatters the light rays in many different directions, no clear reflected image. Each incident ray reflects at a different angle.. Occurs with rough surfaces.
Image Formation by a Plane Mirror
- Images formed are always virtual (cannot be projected onto a screen)
- Images formed are upright (not inverted)
- Images formed are the same shape and size as the object
Solved Example
- Angle of incidence (i) = 90° - angle with the surface
- Angle of reflection (r) = angle of incidence (i)
- Angle between reflected ray and the surface = 90° - angle of reflection (r)
- Angle between incident and reflected rays = 2 * angle of incidence (i)
Spherical Mirrors
-
Concave Mirrors: Curved inward, like a cave. Converging mirrors.
- Object at infinity: highly diminished, point sized, real and inverted
- Object between infinity and centre of curvature: diminished, real, and inverted
- Object at center of curvature: same size as object, real, and inverted
- Object between center of curvature and focus: enlarged, real, and inverted
- Object at focus: image at infinity
- Object between focus and pole: enlarged, virtual, and upright
-
Convex Mirrors: Curved outward, like a ball. Diverging mirrors.
- Object at infinity: diminished, virtual, and upright
- Object between infinity and pole: diminished, virtual, and upright
Refraction and Refractive Index
- Refraction is the bending of light as it passes from one transparent medium to another. This occurs due to a change in the speed of light.
- Refractive index (n) is the ratio of the speed of light in a vacuum (c) to the speed of light in a medium (v): n=c/v
- Factors affecting refractive index include: nature of medium, physical conditions & color of light
- Optically rarer medium: light travels faster
- Optically denser medium: light travels slower
Lens Formula and Magnification
- Lens formula: 1/v + 1/u = 1/f
- v = image distance
- u = object distance
- f = focal length
- Magnification (m) = h'/h = -v/u
Types of Lenses
- Convex/Converging Lens: Thicker in the middle, thinner at edges.
- Concave/Diverging Lens: Thicker at the edges, thinner in the middle
Sign Conventions
- Origin is the optical center
- Distances along the principal axis (left of origin) are taken to be negative.
- Distances along the principal axis (right of origin) are taken to be positive.
- Distances perpendicular to and above principal axis are positive
- Distances perpendicular to and below principal axis are negative
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Description
Test your knowledge on the reflection of light and its laws. This quiz covers the types of reflection, including specular and diffuse, as well as how images are formed in a plane mirror. Perfect for students who want to clarify their understanding of this essential concept in physics.
