SNC2DG Refraction and Snell's Law Problems
1. When you observe a light ray enter an unknown liquid from water, it bends towards the normal. When it is seen entering the same unknown liquid from glycerine (index of refraction is 1.473), it bends away from the normal.
a) In which material is the light fastest? slowest?
b) How does the index of refraction for the unknown liquid compare with the index of refraction for water? glycerin?
2. Determinethespeedoflightinsapphire, water and diamond.
3. A ray of light has an angle of incidence of 30 degrees to the normal when it goes through a piece of Plexiglass. Draw the path of light as it passed out of the glass into air.
4. A flashlight is aimed towards the water from the air at an angle of 30 degrees. What angle does it travel at in the water?
5. Thespeedoflightinan unknown mediumis1.53x108 m/s.Whatisthemedium?
6. What is the angle of incidence in a medium in the case where the angle of refraction in air is 40 degrees and the index of refraction of the medium is 1.58?
7. Arayoflightinairisapproachingtheboundarywithwateratanangleof52degrees. Determinetheangleofrefractionofthelightray.
8. Arayoflightinairisapproachingtheboundarywithalayerofcrownglass (which has an index of refraction of 1.52) at an angle of 42 degrees. Determine the angle of refraction of the light ray entering the crown glass and upon leaving the crown class.
9. Lighttravelsfromairintoanopticalfiberwithanindexofrefractionof1.44.
a) Inwhichdirectiondoesthelightbend?
b) If the angle of incidence on the end of the fiber is 22 degrees, what is the angle of refraction inside the fiber?
c) Sketchthepathoflightasitchangesmedia.
10. [Thinking Question] A scuba diver is unaware of the time. The sun is only 10 degrees above the horizon but the scuba diver thinks the sun is much higher in the sky. At what angle does she think the sun is at? Sketch out the problem to help you interpret the question first.