Physics 1051 Lecture 6/7 Slide 1
Refraction of Light
Physics 1051 Lecture 6/7 Slide 2
Wave Boundary Behavior
• wave speed and wavelength are greater in less dense medium
• wave frequency is not altered by crossing boundary
• reflected pulse is inverted when wave travels from less dense medium to more dense medium
• incident pulse amplitude is greater than reflected pulse amplitude
Physics 1051 Lecture 6/7 Slide 3
Refraction of Light Beam
• Refraction -- bending of light wave path as light passes from one material to another material.
• Refraction occurs at the boundary and is caused by a change in the speed of the light wave upon crossing the boundary.
• Direction of bending depends upon whether light wave speeds up or slows down at the boundary.
Physics 1051 Lecture 6/7 Slide 4
Transmission Across a Boundary
• Wave speed & wavelength change
• When the wave approach is perpendicular to the boundary, its speed changes, but there is no bending of the path
Physics 1051 Lecture 6/7 Slide 5
Refraction of Water Waves
Physics 1051 Lecture 6/7 Slide 6
Refraction Applets
• Applet by National High Magnetic Field Laboratory, Florida State University
• Applet by Fu-Kwung Hwang, National Taiwan Normal University
Physics 1051 Lecture 6/7 Slide 7
Ray Diagram
Physics 1051 Lecture 6/7 Slide 8
Physics 1051 Lecture 6/7 Slide 9
Optical Density
•
Physics 1051 Lecture 6/7 Slide 10
Index of Refraction
• Index of Refraction
• Represented by n
Physics 1051 Lecture 6/7 Slide 11
Indices of Refraction
Physics 1051 Lecture 6/7 Slide 12
Law of RefractionSnell’s Law
Physics 1051 Lecture 6/7 Slide 13
FST & SFA
Physics 1051 Lecture 6/7 Slide 14
Apparent Depth
Physics 1051 Lecture 6/7 Slide 15
Spear-Fishing
Physics 1051 Lecture 6/7 Slide 16
Delayed Sunset
Physics 1051 Lecture 6/7 Slide 17
Broken Pencil
Physics 1051 Lecture 6/7 Slide 18
Palm Tree Mirage