As a beam of light crosses the interface from medium A to medium B, it bends away from the normal. Which of the following statements is/are true? Caution: This question may or may not have more than one correct answer. Select all that apply: the speed of the light is greater in medium A than in B cross out O medium A has a higher index of refraction than B cross out medium B has a higher index of refraction than A cross out the speed of light is the same in both media because the speed of light is always constant cross out The speed of light is greater in medium B than in A cross out total internal reflection has occurred cross out Check The index of refraction of a substance is: Select one: O the speed of light in the substance cross out the angle of refraction cross out the angle of incidence cross out O the speed of light in vacuum divided by the speed of light in the substance cross out O can be measured in metres per second cross out Check A ray of light travelling through air (n=1) is incident at an angle of 40" on some glass and enters the glass with an angle of refraction of 20". What is the refractive index of the glass? Select one: O 0.53 cross out O 0.88 cross out O 1.9 cross out O 2.2 cross out O 3.0 cross out CheckQuestion 4 When light passes from a vacuum into glass, it bends: Not complete Select one: Marked out of 1.00 O towards the normal without changing speed cross out Flag O towards the normal and slows down cross out question O towards the normal and speeds up cross out O away from the normal and slows down cross out O away from the normal and speeds up cross out O not at all because vacuum is not a medium and has no refractive index and so the light ray will not bend. cross out O but without being given the value of the refractive index of the glass it is impossible to say in which direction it bends. cross out Check Question 5 A ray of light encounters the interface between its current medium and a different medium. What is required for the ray to undergo total internal reflection? Not complete Select one: Marked out of 1.00 O The refractive index of the current medium must be greater than the medium the light is trying to enter and the angle of incidence must cross out Flag be greater than the critical angle. question The refractive index of the current medium must be greater than the medium the light is trying to enter and the angle of incidence must cross out be less than the critical angle. O The refractive index of the current medium must be less than the medium the light is trying to enter and the angle of incidence must be cross out greater than the critical angle. The refractive index of the current medium must be less than the medium the light is trying to enter and the angle of incidence must be cross out less than the critical angle. O The refractive index of the current medium must be less than the medium the light is trying to enter and the angle of incidence must be cross out equal to Brewster's angle. Check