refraction

This sounds silly but I know residents from my program (& from friends in other programs) are not comfortable AT ALL with refraction. Yet this is essential... so I'd like hear from anyone involved in a residency where the majority of residents are not only proficient but are strong in...

We are given a figure of a half-cylinder with a point a at the top of the half cylinder. Light is transmitted through a half cylinder and the beam was allowed to strike a semi-circular screen. Question asks : Light that initiates from point a in the figure: A- will always strike the middle of...

Which of the following statements are true about the index of refraction of a substance? I- it is inversely proportional to the speed of light in the substance II- it depends on the properties of the substance III- it depends on the radius of curvature of the substance IV- It can have a value...