Is the angle of refraction measured from the boundary? Physics Refraction Refractions 1 Answer Biology_geek Apr 24, 2014 No, the angle of refraction (#Theta_R#) is always measured between the refracted ray and the normal. Answer link Related questions Who invented the law of refraction? What is the equation for Snell's law? What is the index of refraction? What is the unit for the index of refraction? Does refraction change the direction of light when it passes from air to glass? What is the angle of refraction if a ray of light passes from water into air at an angle of 30 degrees? Using the law of reflection, explain how powder takes the shine off of a person’s nose. what is... What is the speed of light in air? in crown glass? How is refraction related to lenses? How is refraction related to dispersion? See all questions in Refractions Impact of this question 6488 views around the world You can reuse this answer Creative Commons License