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In this Chapter, we shall study the phenomena of reflection and refraction of light using the straight-line propagation of light. These basic concepts will help us in the study of some of the optical phenomena in nature.
May 16, 2020 · The refraction of light produces a wide range of phenomena, including mirages, rainbows, and curious optical illusions such as making fish appear to swim in shallower water than they actually...
Refraction refers to the bending of the transmitted light at the interface between two transparent materials. The angle of refraction depends on the angle of incidence and the relative speeds of the light in the two different media and can be found from the relationship sinθ2 sinθ1 = v2 v1
- ◆ Review Questions
- ▼ Questions For Thought and Discussion
- ■ Exercises
- ● Experiments For Home, Laboratory, and Classroom Demonstration
- Laboratory
1. Does light travel faster in water or in glass? How do you know this?2. Is the critical angle greater at a water–air surface or a glass–air surface?3. What is dispersion? Does water exhibit dispersion? How do you know?4. Why does increasing the diameter of a converging lens increase the brightness of the image?1. Can total internal reflection occur when light is entering a material with a higher index of refraction? Explain your answer.2. A converging lens forms a real, inverted image of an object on a screen. What happens to the image if the top half of the lens is covered up?3. People who are in need of corrective eyeglasses often squint to improve their vision. Why squinting may produce temporarily improved vision?4. Nonprescription sunglasses are often curved, as are automobile windshields. Why don’t these converge or diverge light rays?1. Using a calculator, find the sines (sin) of the following angles: 20°, 30°, 45°, 60°, 70°, 80°, and 90°. Make a graph of sin θ versus θ.2. Light travels from air into water. What is the angle of refraction if the angle of incidence is 30°?3. Light travels from crown glass into water. The angle of incidence in the crown glass is 40°. What is the angle of refraction?4. The critical angle for light traveling from a particular type of glass into air is 39.1°. What is the index of refraction of the glass?Home and Classroom Demonstration 1. 1. Bent pencil. Fill a clear glass or beaker about three-quarters full of water. Insert a pencil vertically into the water so that half the pencil is submerged. How does the pencil appear when viewed from the side? Why does the pencil look this way? Tilt the submerged pencil. How does the pencil appear? What do y...
4.1 Refraction and Total Internal Reflection4.2 Converging Lens4.3 Simple Magnifier and Telescope- Thomas D. Rossing, Christopher J. Chiaverina
- 1999
To better understand the laws of reflection and refraction of light. To experimentally determine the index of refraction of glass using the law of refraction. To study what happens to the transmitted light when it goes from less dense to more dense media and vice versa.
In the case where a traveling ray of light does encounter an obstacle while traveling in a medium the light often undergoes two processes – reflection and refraction. Some percentage of the light will reflect from the surface of the obstacle and the remaining light will transmit into the material, or refract.
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In this chapter we will study the phenomena of reflection and refraction using the property of light i.e. straight line propagation (Light wave travel from one point to another, along a straight line).
