Chapter 15 Refraction Section 1 Refraction Refraction of
- Slides: 44
Chapter 15 Refraction
Section 1 Refraction
Refraction of Light • Is the bending of a wave disturbance as it passes (at an angle) from one medium into another • Occurs because velocity changes
Refraction
Refraction of Light • If the light ray moves from a lower speed material to higher speed material, it will bend away from the normal. • If the light ray moves from a higher speed material to lower speed material, it will bend toward the normal. • No refraction occurs if the ray enters the new material parallel to the normal.
Refraction
Refraction of Light – Snell’s Law • Index of Refraction: ratio of vvacuum to vmedium n = c/v n = λo / λn Wavelength affects the index of refraction
Refraction of Light Snell’s Law: ni(sin θi) = nr(sin θr)
Refraction of Light
Refraction of Light
Section 2 Thin Lenses
Lenses What is a lens? a transparent object that refracts light rays, causing them to converge or diverge to create an image The curved surfaces change the direction of light – refraction occurs at each surface (front/back)
Types of Lenses Converging Lenses (Convex) – thicker in center Diverging Lenses (Concave) – thinner in center Where does bad light end up?
Types of Lenses - Continued Combination Lenses In prism
Lenses – Ray Drawings – 3 Rays Parallel Ray: is incident parallel to principal axis; refracts through to focal point Central Ray: incident through center of lens; travels straight through lens Focal Ray: incident through the focal point; refracts parallel to principal axis What do you call someone who studies physics?
Ray Drawings – Addressing Refraction A physician
Lenses – Ray Drawings – 3 Rays Parallel Ray: is incident parallel to principal axis; refracts through to focal point Central Ray: incident through center of lens; travels straight through lens Focal Ray: incident through the focal point; refracts parallel to principal axis Who’s the sickest rapper alive?
Image Location for a Converging Lens Wheeze Khalafa
Image Location for a Converging Lens Note distance verbage (p, q, f) and Image/Object Identification
Image Location for a Diverging Lenses produce only VIRTUAL IMAGES
Thin-Lens Equation and Magnification Hail to the vectors
Thin Lens Combinations The image from lens 1 becomes the object for lens 2 Go ions
Section 3 Optical Phenomena
Total Internal Reflection nisin θc = nrsin 90 o but ni must be > nr so, to determine critical angle: θc = sin -1 (nr/ni)
Total Internal Reflection
Total Internal Reflection
Total Internal Reflection
Total Internal Reflection
Total Internal Reflection - Applications • Diamonds • Fiber Optics
Atmospheric Refraction
Atmospheric Refraction
Atmospheric Refraction
Dispersion
Dispersion
Dispersion
Lens Aberrations
Lens Aberrations
Lens Aberrations
Eyes and Microscopes Optical Interests
Visual Conditions – Snellen Chart
Visual Conditions – Snellen Chart
Visual Conditions
Visual Conditions (presbyopia)
Microscopes
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- Refraction of sound
- Sectional view examples
- Removed section drawing
- Half vier
- Describing energy section 2 answers
- Vray fog bias
- Double refraction
- Astenopy
- Binocular balance refraction
- Relative index of refraction
- Index of refraction of jello
- At what angle of incidence is the angle of refraction 90
- Critical angle of light
- How to calculate angle of refraction
- Total internal reflection in diamond
- Critical angle
- Concave lens
- Snell's law
- Index of refraction snell's law
- Refraction by a lens
- Clinical refraction definition
- Reflection vs refraction
- Reflection refraction diffraction interference
- Cmedium
- Reflection refraction absorption transmission
- Refraction phenomena
- Refraction
- A lens that curve outwards and are fatter in the middle
- Line of reflection
- Refraction facts
- Index of refraction of gelatin
- Laws of optics
- Furzy cliff
- Polystyrene latex spheres
- Wave refraction
- Refraction of light in lenses
- Refraction oeil
- Speed of light in quartz
- Laws of refraction
- Reflection refraction diffraction
- Scoovies
- Refraction examples
- The refractive indices of crown glass prism for c d f