Lecture 14 - Refraction (Ch. 25.5-25.8)

Lecture 14 - Refraction (Ch. 25.5-25.8) - Lecture 15 Ch 25...

Info iconThis preview shows pages 1–12. Sign up to view the full content.

View Full Document Right Arrow Icon
Lecture 15 Ch 25 Reflection and Refraction of Light
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Midterm
Background image of page 2
The Ray Model of light o The ray model is a useful simplification for describing how light waves travel o A “ray” is a line perpendicular to the wavefronts (crests) of the wave The diagram shows a traveling plane wave and the corresponding rays
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Law of Reflection Angle of Reflection Equals the Angle of Incidence
Background image of page 4
Law of Reflection Example Problem: What is theta?
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Law of Reflection Example Problem: What is theta? 90 - 35 = 55 65 25 35 90 - 65 = 25 180 - 120 - 25 = 35 55
Background image of page 6
Light at a Boundary o At a boundary between two different media, light can be both reflected and transmitted o The proportion of light reflected vs. transmitted depends on the angle and the optical properties of the media
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Index of Refraction: o Another way to write Snell’s law:
Background image of page 8
Index of Refraction: Note: Light will always travel from point a to point b in the shortest time! Into slower medium : bent towards normal ( θ 2 < θ 1 ) Into faster medium: bent away from normal ( θ 2 > θ 1 )
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Example Problem Light travels from air into an optical Fber with an index of refraction of 1.44. 1) In which direction does the light bend? 2) If the angle of incidence on the end of the Fber is 22 o , what is the angle of refraction inside the Fber?
Background image of page 10
Example Problem Light travels from air into an optical Fber with an index of refraction of 1.44. 1) In which direction does the light bend? 2) If the angle of incidence on the end of the Fber is 22 o , what is the angle of refraction inside the Fber?
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 12
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/08/2008 for the course PHYS 3B taught by Professor Wu during the Spring '08 term at UC Irvine.

Page1 / 31

Lecture 14 - Refraction (Ch. 25.5-25.8) - Lecture 15 Ch 25...

This preview shows document pages 1 - 12. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online