Refraction and angle of incidence. Image Transcriptionclose (a) Calculate the angle of refraction at the first surface (in degrees). Answer to: How to calculate index of refraction using critical angle? For Higher Physics, revise how to calculate the expected direction of refracted rays using Snell’s law. Calculate critical angle given refractive index. 22.48 degrees 3. (Round your answer to at least one decimal place.) refracted angle calculator: formula for refractive index of glass slab: formula for refractive index in terms of wavelength: refractive index wavelength equation: formula of refractive index class 10: index refraction calculator: how to calculate critical angle when refractive index is given: how to calculate … The angle of incidence is 35 degrees and the refractive index of the glass is 1.50. Umm, can someone help me with htis question: A ray of light strikes a glass block at an angle of incidence 50 degrees. (Give you answer to two decimal places) Answer 1. Calculate the angle of refraction for a monochromatic ray of light incident at an air to glass boundry. No refraction takes place 4. i think it's 50 over 1.5...does that sound right? Calculate the angle of refraction if the refractive index for glass is 1.5 and th speed of light in glass is 200,000,00 m/s. (b) Calculate the angle of … 2.25 degrees 2. When a ray of light is incident at normal incidence, (at right angles), to the surface between two optical materials, the ray travels in a straight line.