what do u mean by light , its reflection and refraction & what is magnification?
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Lighty is an electromagnetic ray that gives the sensation of sight.Electromagnetic waves are waves that donot need any material medium for their propogation.\n\n\nWhen a light falls on a polished surface like mirror reflection occures and this phenominon is called reflection\n\nWhen a light falls on a transparent substance like water  and glass it passes throuhg that medium and this phenominon is called refraction\n\nMagnification is the ratio of the size of the image to the size of the object
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Whenever a ray enters from glass medium to air medium, the light is reflected as well as refracted. That is both reflection and refraction take place.\n\nWhen the angle of incidence (in glass) is zero, the angle of refraction (in air) is also zero. This is called normal incidence and there is no reflection inside the glass.\n\nWhen the angle of incidence is increased from zero, there is both reflection and refraction. For refection the angle of incidence is equal to the angle of reflection and for refraction the angle of refraction (in air) is greater than the angle of incidence (in glass).\n\nWhen the angle of incidence equals the critical angle there is both reflection and refraction. For refection the angle of incidence is equal to the angle of reflection and for refraction the angle of refraction (in air) equals 90 degree.\n\nWhen the angle of incidence exceeds the critical angle, then there is no refraction and there is only reflection and the angle of incidence is equal to angle of reflection.\n\nThe ray not only is reflected internally but also is totally reflected, i.e., there is no refraction.  That is there is TOTAL internal reflection.
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The maximum velocity of light is in air (strictly in vacuum).\n\nThe velocity is less in other medium.\n\nThe change in velocity from medium to medium is refraction.\n\nWhen light enters from medium 1 to medium 2, a potion of light is bounced back into the medium 1 and the remaining passes into medium 2 (Refracted). The bouncing back is reflection.\n\nThe proportion of reflection or refraction depends on the angle the \nray makes at the point of incidence on the boundary.\n\nWhen light enters from glass (a medium of less velocity; optically denser medium) into air (a medium of more velocity; optically rarer medium) no portion of light is refracted (do not enter into air) at certain angles of incidences. The whole portion of light is bounced back into glass\n\nThey are TOTALLY AND INTERNALLY reflected.\n\nThere is no change in velocity and therefore total ilnternal reflection is not refraction,
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an optical medium is the medium through which light travels.\nin scientific words optical medium is a medium through which light undergoes REFLECTION and REFRACTION from one medium to another.such as glass,water,layers of atmosphere,air,and many more(but not those media which absorbs the light)\nthere are two types of optical medium-:\n\nOPTICAL RARER MEDIUM\na medium in which the speed of light is more is known as optically rarer medium.\n\nOPTICAL DENSER MEDIUM\na medium in which the speed of light is slow is known as optically denser medium.
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From your question, I understand that you are needed some review of concepts about light.\n\nLight is not a matter to ‘see’.  It is energy.  We can perceive its presence through our eye.\n\nTherefore, whether speed of energy with which it is transmitted from one object to another is high or low, we cannot “see” it.\n\nIf an object completely stops the light; its speed is zero; in a sense, the energy is resting there, no energy reaches our eye, we cannot perceive the object.\n\n Some objects look black, because no light is coming from the object. It means the light is entering into the object. What happens to that light? Inside the medium its velocity is reduced.   Depending upon the nature of the medium the energy of light may be absorbed in which case there is no light inside the medium. If not absorbed definitely it will come out of the medium.  In any case we cannot “see” the light.\n\n The refractive index of a medium is the ratio of the speed of light in air to the speed of light in the medium. The speed of light is 3E (8) m/s.\n\nThe maximum refractive index is ~ 4.  Thus there is no material which can reduce the speed by one-fourth of its present speed. \n\n Finally whatever its speed we cannot visualize the motion of light as it is energy and it is not matter.\n\nNowadays every one is familiar with radio, T. V, cell phone, internet connection to computers.\n\nThese are all working using electro magnetic rays of different frequencies like light wave.\n\nThough we are not able to perceive these rays with our eye, we are using them. The light rays are perceived by our eye. It is the only difference between the rays.
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The angle of refraction of the sunlight as it comes through the atmosphere. At sunset the colors change because the angle gets steeper. Its like a prism.
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The light is reflected
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Refraction: Deflection from a straight path undergone by a light ray or energy wave in passing obliquely from one medium (as air) into another (as glass) in which its velocity is different.
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Everything you see comes from light that enters your eyes.  The study of light is called OPTICS it is part of the science named PHYSICS.\n\nWhat your reflection looks like depends on a lot of things.  How large is the sphere? Where are you standing in the sphere?  If you think about it, what you see in the mirror depends on where you stand.  You can try this in just a regular flat mirror.  Stand in different spots, and look at what you see.\n\nI have given you a few links showing diagrams of how light rays are reflected in a spherical mirror.   If you were inside, you would be seeing a concave surface.\n\nEscher drew pictures of what he would look like in a spherical mirror, from the outside.  You can do this yourself,  by looking in the gardening area for a mirror globe, or a glass Christmas ball.\n\nA concave reflecting surface can be found in a magnifying mirror, or in a spoon or bowl.  I have also included a link to purchase spherical mirrors and other optical  devices.  Finally, I have included a site with some virtual optical experiments.\n\nI hope this helps to answer your question.  Have fun!
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reflection or shadow!!
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Light is refracted from a single point. Since the light which gets refracted into the same colors is all the same distance from the point source, a circle is formed.\n\n-Wied
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Light can move in a few ways, all of which are rays.  Rays are striaght lines, and light can never curve (unless you are in a black hole, if that's the case....too bad for you) but it can be REFLECTED or REFRACTED.\n\nReflection is when a light ray bounces off of a surface and does so in predictable angles.  On a flat surface, the light relflects at an angle equal to that which struck the surface.  This is how a flat, or plane, mirror works (bathroom cabinet, dresser).  A rounded surface can magnify and distort an image by reflecting the light rays at different angles over its entire surface.  The law of reflection still holds true, but since the surface is irregular, the image reflected is not true to life (fun house mirrors, magnifying mirror for make-up or shaving).\n\nREFRACTION is the bending of light as it changes mediums and cause changes to images as well, such as when looking into an aquarium tank.  I know you didn't ask about this, but call it a bonus.
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magnification = apparent size/actual size\n\nso actual size = apparent size/magnification.\n\nso if it appears to be 8mm under your microscope,\nactual size = (8/1000) mm\n                  = 8 micrometres or microns.
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*It allows a laser to be viewed - light from the laser cannot be viewed unless it's bouncing off a mirror - a mirror reflects and refracts light\n\n*Allows us to view things from a variety of angles (car mirrors, periscopes, etc)\n\n*Personal hygeine?\n\n*Decorative
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Violet is a constituent of White Light\nThe Refraction of Light and Dispersion of lIght is in the pattern of VIBGYROR (V for Violet)
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A mirror reflects light.  Light from an object strikes the mirror and changes direction so that the angle of incidence equals the angle of reflection.  As a result, light appears to come from behind the mirror, at an apparent distance equal to the distance they are in front of the mirror.\n\nI see no connection to the Boognish.
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The sun converts millions of tons of matter into energy every second via fussion processes; this energy is radiated out in every direction in the form of photons and a slew of other particles. \n\nWhen these photons reach earth, we call it "incident light". Light is easily reflected, refracted, and absorbed by many materials on earth, and at every level of interaction, energy is lost to heat.\n\nEdit - what's with all this "pan heating an egg" stuff? What does that even mean?