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This Concept Map, created with IHMC CmapTools, has information related to: Refraction, The refractive index is an indicator of the speed of light in a medium ???? The refractive index is an indicator of the direction of bending of light in a medium, When light enters a medium (like water) it bends. The bending of light is known as Refraction ???? Light appears to slow down when it enters water, An incident ray of light travelling into an optically denser medium bends towards the normal ???? An incident beam of light travelling into an optically less dense medium bends away from the normal, Light changes wavelength when it enters a different medium(eg. air to water) ???? Waves of light can be thought of in terms of wavefronts, The slowing down of light is due to an optical property of the medium ???? Light changes wavelength when it enters a different medium(eg. air to water), Light appears to slow down when it enters water ???? The slowing down of light is due to an optical property of the medium, The degree to which the light bends towards/away from the normal is called the angle of refraction ???? when the incident beam of light is travelling along the normal ( i.e. perpendicular to the medium) no bending of light takes place., when the incident beam of light is travelling along the normal ( i.e. perpendicular to the medium) no bending of light takes place. ???? An incident ray of light travelling into an optically denser medium bends towards the normal, Waves of light can be thought of in terms of wavefronts ???? The wavefronts of light "twist" when they enter into a different medium (like water) at an oblique angle. The twisting is due to change in the speed of light., The twisting of wavefronts causes the bending of light which occurs only at the boundary of the medium ???? The degree to which the light bends towards/away from the normal is called the angle of refraction, The wavefronts of light "twist" when they enter into a different medium (like water) at an oblique angle. The twisting is due to change in the speed of light. ???? The twisting of wavefronts causes the bending of light which occurs only at the boundary of the medium, The ratio of the sine of the angle of incidence and the sine of the angle of refraction is always a constant called refractive index (2nd law of refraction) ???? The refractive index is an indicator of the speed of light in a medium, An incident beam of light travelling into an optically less dense medium bends away from the normal ???? The ray of light will always travel in the same plane(1st law of refraction), The ray of light will always travel in the same plane(1st law of refraction) ???? The ratio of the sine of the angle of incidence and the sine of the angle of refraction is always a constant called refractive index (2nd law of refraction)