define the term refraction
define the term refraction, define the term refraction of light, define the term refractive index, define the term refractive index of a medium, define the term angle of refraction, define the term index of refraction
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define the term refraction
define the term refraction of light
define the term refractive index
define the term refractive index of a medium
define the term angle of refraction
define the term index of refraction
define the term refraction, define the term refraction of light, define the term refractive index, define the term refractive index of a medium, define the term angle of refraction, define the term index of refraction