# Reflection of Light Reflection and Refraction of Light Refraction of Light

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• Slide 1
• Reflection of Light Reflection and Refraction of Light Refraction of Light
• Slide 2
• Definitions Incident wave-_____________________________________. _______________wave that is bounced away from the surface. Refracted-_________________________________________. ________ ___________ __________-an optical phenomenon that occurs when a ray of light strikes a medium boundary at an angle larger than a particular critical angle with respect to the normal to the surface. ________ ________-the angle of incidence above which total internal reflection occurs. ____________- to a flat surface is a vector that is perpendicular to that surface. To a non-flat surface at a point P on the surface is a vector perpendicular to the tangent plane to that surface at P.
• Slide 3
• Reflection The production of an ________ by or as if by a ________. Something, such as ______, _______ _____, ______, or an _______, that is reflected. The change in ________ of a wave, such as a light or sound wave, away from a boundary the wave encounters. Reflected waves ______ in their original medium rather than _______ the medium they encounter.
• Slide 4
• Reflection According to the ____ __ ______, the angle of reflection of a reflected wave is equal to its angle of incidence.
• Slide 5
• Diffuse Reflection Light is reflected in ___ ____________. This is caused by a surface that isnt _______.
• Slide 6
• Specular reflection All the light travelling in ___ direction and reflecting from the mirror is reflected in ___ direction. This occurs on a ______ surface.
• Slide 7
• Definitions _____ _____- the single point where light from the object hits or is focused. Located half the distance from the mirror to the center of curvature. _____ _____-the distance from the reflecting surface to the focal point. _____- formed when the incident and reflected rays intersect in front of the mirror. ________- does not actually exist (no light is produced). Occur at points where extensions from incident and reflected rays converge behind the mirror. _______ of Curvature- the ______ of that original sphere. _______ of Curvature- the ______ of the sphere. _____- the point where the mirror crosses the principal axis. _________ ____- a line drawn through the vertex, focus and center of curvature.
• Slide 8
• Plane Mirrors Just kidding
• Slide 9
• Plane Mirrors A mirror with a flat surface Properties of an image in a plane mirror The image is ________ The image is the ______ size as the object The image is the ______ distance from the mirror as the object appears to be The image is _______, not _______, because the light rays do not actually pass through the image.
• Slide 10
• Spherical Mirrors A piece cut out of a reflective sphere. Focal length of a spherical mirror: f=R/2 Either _______ or ______.
• Slide 11
• Convex Mirrors or Diverging Mirror Image is _______ and _______. Used for security in stores and on the passenger side of many cars. Light rays that strike the mirror surface are reflected so that they _______, or go apart, and they never come to a point. The focal length is ________. The object and focus are on ___________ sides of the mirror. All images are _______ than the object.
• Slide 12
• Rules of Reflection for Convex Mirrors Any incident ray traveling ________ to the principal axis on the way to a convex mirror will reflect in such a manner that its extension will pass _______ the focal point. Any incident ray traveling _______ a convex mirror such that its extension passes through the focal point will reflect and travel ________ to the principal axis. Any incident ray which is directed _______ the center of curvature of the mirror is ________ back along its ____ path.
• Slide 13
• Concave Mirror or Converging Mirror Can have either ____ or _______ images. Light rays that strike the mirror surface are reflected so that they ________, or come together, at a point. Focal length is ________. The object and the focus are on the _____ side of the mirror.
• Slide 14
• Rules of Reflection for Concave Mirrors Any incident ray traveling ________ to the principal axis on the way to the mirror will pass through the _____ _____upon reflection. Any incident ray passing through the _____ _____ on the way to the mirror will travel parallel to the ________ ____upon reflection.
• Slide 15
• The Mirror Equation 1/_+_/d i =1/_ d o is the distance from the mirror to the object d i is the distance from the mirror to the image f is the focal length of the mirror
• Slide 16
• Magnification In most cases the height of the image _______ from the height of the object. This means that the mirror has done some _________ or ________.
• Slide 17
• Magnification M=h i /__=__/d o The ratio of the image height to the object height, which is closely related to the ratio of the image distance to the object distance.
• Slide 18
• Magnification M=h i /__=__/d o If magnification is __ then the object and the image are the same size. If m__1 then the image is larger. If m__1 then the image is smaller. If m__0 then the image is upright and if m__0 then the image is inverted.
• Slide 19
• Refraction The change of direction of a ray of _____, _____, ____, or the like, in passing obliquely from one medium into another in which its wave velocity is _________. The change in the _____ of propagation depends on the __________ between the index of refraction of the original medium and the medium entered by the wave, as well as on the _________ of the wave.
• Slide 20
• Refraction The speed of light in a vacuum is ______________. When light travels through a different material, it travels at ____________ speed.
• Slide 21
• Index of RefractionIndex of Refraction The speed of light in a given material is related to a quantity called the _____ __ _________, n. Index of refraction: n=_/v The ratio of the speed of light (_) in a vacuum to the speed of light in the medium (_). The _________ changes as well. Index of refraction in terms of wavelength N=_/ m where _ is the wavelength in vacuum and m is the wavelength in the medium
• Slide 22
• Refraction Although the _____ changes and wavelength _______, the frequency will be ________. Frequency, wavelength, and speed are related by: V=_
• Slide 23
• Snells Law The relationship between the angles of incidence and refraction and the ________ of refraction of the two media. n 1 _____=n 2 sin 2 or sin 1 /sin 2 =__/v 2
• Slide 24
• Definitions ____- a carefully ground or molded piece of transparent material that refracts light rays in such a way as to form an image. _________ axis- the __________ axis. __ _____- the point on the principal axis that is twice as far from the vertical axis as the focal point.
• Slide 25
• Converging Lenses A lens that _________ rays of light that are traveling ________ to its principal axis.
• Slide 26
• Diverging Lenses A lens that ________ rays of light that are traveling parallel to its _________ axis.
• Slide 27
• Double Convex Lens The fact that a double convex lens is _______ across its middle is an indicator that it will converge rays of light that travel parallel to its principal axis.
• Slide 28
• Double Concave Lens The fact that the double concave lens is _______ across its middle is an indicator that it will diverge rays of light that travel parallel to its principal axis.
• Slide 29
• Any incident ray traveling parallel to the principal axis of a converging lens will _______ through the lens and travel through the _____ point on the opposite side of the lens. Any incident ray traveling through the _____ _____ on the way to the lens will refract through the lens and travel parallel to the principal axis. Refraction Rules for a Converging Lens
• Slide 30
• Any incident ray traveling towards the focal point on the way to the lens will refract _______ the lens and travel ________ to the principal axis. Any incident ray traveling parallel to the principal axis of a diverging lens will _______ through the lens and travel in line with the focal point (i.e., in a direction such that its extension will pass through the focal point). Refraction Rules for a Diverging Lens
• Slide 31
• A Third Rule of Refraction An incident ray that passes through the _____ of the lens will in affect ________ in the ____ direction that it had when it entered the lens.
• Slide 32
• Converging Lens Image Formation Can produce real ___ virtual images.
• Slide 33
• Object-Image Relations for Diverging Lens
• Slide 34
• Object-Image Relations for Converging Lens If the object is located ______ 2F: If the object is located __ 2F: If the object is located _______ 2F and _: If the object is located __ F: If the object is located __ _____ __ F:
• Slide 35
• Diverging Lens Image Formation Can only produce virtual images.

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