Light travels from air into a fluid which has a refractive index of 1.55. The angle of incidence is 41o. a) Calculate sin of the angle of incidence. Give your answer to 3 decimal places and use it to this accuracy in any subsequent calculations, if needed. Hint: make sure your calculator is on degrees (not radians or grads). b) Calculate the angle of refraction (in degrees). Take the index of refraction of air as 1. Make sure you do all working to at least 3 decimal places. Give your answer to 1 decimal place. c) Light travels out of the fluid into air at the critical angle. What is the angle of refraction (in degrees)? Give your answer as a whole number. d) Calculate the critical angle (in degrees). Give your answer to 1 decimal place.

Light travels from air into a fluid which has a refractive index of 1.55. The angle of incidence is 41o. a) Calculate sin of the angle of incidence. Give your answer to 3 decimal places and use it to this accuracy in any subsequent calculations, if needed. Hint: make sure your calculator is on degrees (not radians or grads). b) Calculate the angle of refraction (in degrees). Take the index of refraction of air as 1. Make sure you do all working to at least 3 decimal places. Give your answer to 1 decimal place. c) Light travels out of the fluid into air at the critical angle. What is the angle of refraction (in degrees)? Give your answer as a whole number. d) Calculate the critical angle (in degrees). Give your answer to 1 decimal place.