Refraction and Snell's law
Grade 11 Science Worksheet
Circle the best answer, or write your answer on the line.
Use n = 1.00 for air. A ray in air enters water (n = 1.333) at 40° to the normal. At what angle to the normal does it travel inside, to 0.1°, Ari?
Use n = 1.00 for air. A ray in air enters Plexiglas (n = 1.49) at 30° to the normal. At what angle to the normal does it travel inside, to 0.1°, Bo?
Use n = 1.00 for air. A ray in air enters diamond (n = 2.417) at 60° to the normal. At what angle to the normal does it travel inside, to 0.1°, Esme?
A straw in a glass of water looks bent at the surface. What causes this, Jun?
- The glass reflects the straw
- Light bends as it leaves the water
- The water bends the straw
A coin at the bottom of a cup of water looks closer to the top than it is. Why, Kira?
- Its light bends at the water's surface
- Water makes the coin float up
- The cup magnifies it
A glass prism spreads white light into colors. Why, Luz?
- Each color bends by a slightly different amount
- Each color reflects off a different face of the prism
- The glass adds color to the light
In water, a ray travels at 28.8° to the normal toward the surface. At what angle to the normal does it leave into air, Milo?
- 21.6°
- 28.8°
- 40°
Use n = 1.00 for air. A ray inside water (n = 1.333) hits the surface at 30° to the normal. At about what angle does it leave, Noah?
- About 41.8°
- About 22.0°
- 30°
A ray leaves a diamond into air. How does its angle to the normal change, Pia?
- It gets smaller
- It gets bigger
- It stays the same
Read this first
Refractive indices (Engineering ToolBox)
Material Refractive index n air (0 °C) 1.00029 ice 1.31 water (20 °C) 1.333 quartz glass 1.46 Plexiglas 1.49 diamond 2.417 Using the table, about how many times as fast does light travel in water as in diamond, Ren?
- About 0.55 times
- About 3.75 times
- About 1.81 times