Podcast
Questions and Answers
On lighting up the room, things become ______.
On lighting up the room, things become ______.
visible
The bending of light around an opaque object is called diffraction.
The bending of light around an opaque object is called diffraction.
True (A)
What is the name of the phenomenon in which light travels along a straight line through a transparent medium?
What is the name of the phenomenon in which light travels along a straight line through a transparent medium?
refraction
Match the following terms with their definitions:
Match the following terms with their definitions:
What is the relationship between the radius of curvature (R) and the focal length (f) of a spherical mirror?
What is the relationship between the radius of curvature (R) and the focal length (f) of a spherical mirror?
Virtual images formed by a spherical mirror can always be projected onto a screen.
Virtual images formed by a spherical mirror can always be projected onto a screen.
What is the name of the point where parallel rays of light converge after reflection from a concave mirror?
What is the name of the point where parallel rays of light converge after reflection from a concave mirror?
A convex mirror produces an inverted image for all positions of the object.
A convex mirror produces an inverted image for all positions of the object.
What are the two main types of spherical mirrors?
What are the two main types of spherical mirrors?
Which of these is NOT a use of concave mirrors?
Which of these is NOT a use of concave mirrors?
What is the main difference between the New Cartesian Sign Convention for spherical mirrors and lenses?
What is the main difference between the New Cartesian Sign Convention for spherical mirrors and lenses?
The focal length of a convex lens is always negative.
The focal length of a convex lens is always negative.
What is the SI unit of power of a lens?
What is the SI unit of power of a lens?
What is the term used to express the degree of converging or diverging ability of a lens?
What is the term used to express the degree of converging or diverging ability of a lens?
A convex lens with a power of +2.5 D has a shorter focal length than a concave lens with a power of -2.5 D.
A convex lens with a power of +2.5 D has a shorter focal length than a concave lens with a power of -2.5 D.
The image formed by a concave lens is always ______.
The image formed by a concave lens is always ______.
Flashcards
Reflection of Light
Reflection of Light
Light that falls on a surface and bounces back.
Mirror
Mirror
A polished surface that reflects most of the light that falls on it.
Angle of Incidence
Angle of Incidence
The angle between the incident ray and the normal to the reflecting surface at the point of incidence.
Angle of Reflection
Angle of Reflection
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Spherical Mirror
Spherical Mirror
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Concave Mirror
Concave Mirror
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Convex Mirror
Convex Mirror
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Pole (P)
Pole (P)
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Centre of Curvature (C)
Centre of Curvature (C)
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Radius of Curvature (R)
Radius of Curvature (R)
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Principal Axis
Principal Axis
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Principal Focus (F)
Principal Focus (F)
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Focal Length (f)
Focal Length (f)
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Aperture
Aperture
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Real Image
Real Image
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Virtual Image
Virtual Image
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Refraction of Light
Refraction of Light
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Refractive Index
Refractive Index
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Lens
Lens
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Convex Lens
Convex Lens
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Concave Lens
Concave Lens
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Principal Focus (F) of a Lens
Principal Focus (F) of a Lens
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Focal Length (f) of a Lens
Focal Length (f) of a Lens
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Power of a Lens
Power of a Lens
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Dioptre (D)
Dioptre (D)
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Lens System
Lens System
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Study Notes
Light - Reflection and Refraction
- Light travels in straight lines, indicated as rays
- Objects reflect light, making them visible in a room
- Light bends around small objects (diffraction)
- Light acts as both a wave and a particle
- Reflection involves light bouncing off a surface
- Refraction involves light bending as it passes from one medium to another
- The angle of incidence equals the angle of reflection
- Spherical mirrors can be concave or convex
- Concave mirrors converge light, forming real or virtual images
- Convex mirrors diverge light, forming only virtual images
- Refractive index describes how much a medium slows light
- Ray diagrams illustrate light's path through lenses and mirrors
- Lenses are transparent materials with curved surfaces to refract light, creating images
- Converging lenses (convex) focus light rays, forming real or virtual images
- Diverging lenses (concave) spread light rays, forming only virtual images
- Lens power is the reciprocal of its focal length (measured in diopters)
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