Diffraction of light
- 1. Diffraction of Light Austen Corbitt and Lindsey Stanfield
- 2. Objectives ❖Describe how light waves bend around obstacles and produce bright and dark fringes. ❖Describe how diffraction determines an optical instrument’s ability to resolve images.
- 3. Introduction ● In this presentation, we will be introducing: ✓Key Terms ✓How it works ✓How Light Bends Around Obstacles ✓Production of Dark and Light Fringes ✓ Resolving Images
- 4. Key Terms • • • • Diffraction - a change in light wave direction as they pass from one medium to another. Aperture - a small slit in which light travels Minima - the dark regions of the diffraction pattern. Prima Maxima - bright central region of the diffraction pattern.
- 5. What is Diffraction? • • Diffraction is when light passes through an object because of the slits or holes in it, causing it to produce a light on the other side of that object. There are many different ways diffraction occurs: Light, sound, water, etc.
- 6. How Stuff Works This is the maxima This is the minima
- 7. How Light Bends Around an Object ❖Light bends around an object by diffraction, obviously; but what does that mean? ❖When an object interferes with the passage of light, the waves will pass through a slit in a objects. Then they will spread out in a certain way on the other side of the object.
- 8. Examples ❖ Slit size equal to wavelength wavelength Slit size 5x the
- 9. Resolving Images • • • Most people didn’t know that diffraction is also occurs in the resolution of images. When a camera lens is used, diffraction occurs when light passes through the camera’s aperture, causing the picture to be disoriented or unresolved. The camera has a certain feature that corrects the disoriented picture.
- 10. This picture is what is expected to come out when a camera takes a picture. This picture is the result when the resolution is disoriented because of diffraction.
- 11. Cited Page ● web.utk.edu. (n.d.). web.utk.edu. Retrieved October 28, 2013, from http://web.utk.edu/ ● Davidson, M. W. (1998, June 20). Molecular Expressions Microscopy Primer: Light and Color - Diffraction of Light: Interactive Java Tutorial. Molecular Expressions Microscopy Primer: Light and Color - Diffraction of Light: Interactive Java Tutorial. Retrieved October 28, 2013, from http://micro.magnet.fsu.edu/primer/java/diffra ● McHugh, S. (n.d.). LENS DIFFRACTION & PHOTOGRAPHY. Diffraction Limited Photography: Pixel Size, Aperture and Airy Disks. Retrieved October 28, 2013, from http://www.cambridgeincolour.com/tutorials/diffractionphotography.htm ● Reichmann,, M., Raber, K., & Sanderson, C. (n.d.). Luminous-Landscape Copyright.Luminous-Landscape Copyright. Retrieved October 26, 2013, from http://www.luminous-landscape.com/about/luminous_landscape