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Posted on: Friday, August 12th, 2022 In: Learning Optics with Austin
We briefly discussed spherical and aspherical lenses in “Intro to Optical Components”. Spherical lenses can further be broken down into different categories. Plano convex lenses are flat on one side while spherical on the other. Biconvex lenses are spherical on both sides. Similarly, for concave lenses, plano concave lenses are flat on one side and […]
Read morePosted on: Monday, August 1st, 2022 In: Learning Optics with Austin
Lenses come in all different forms, not just through the process of manufacturing. In fact, our own eyes are an optical system. Four main “components” to our eye are: 1) muscle, 2) lens (crystalline), 3) Pupil, 4) Retina. Closing your eyes when there are bright lights is an act of the muscles while the pupil […]
Read morePosted on: Tuesday, July 12th, 2022 In: Learning Optics with Austin
Light sources such as the sun give off light, but why? The equation E = hf relates the wavelength of light to energy where E is energy, h is Planck’s constant, and f is the frequency. Since we know from “How to Describe Light” that f = c / λ, we can also rewrite the […]
Read morePosted on: Tuesday, June 21st, 2022 In: Learning Optics with Austin
With the knowledge of interference and polarization, it is time to talk about the practical applications of both! Diffraction gratings are used to change the path of light and there are two types: transmission grating and reflection grating. A transmission grating utilizes diffraction to break light apart into different colors. A reflection grating has a […]
Read morePosted on: Monday, June 6th, 2022 In: Learning Optics with Austin
Now that we have explored light waves, we can dive more in depth into polarization. In how to describe light, we mentioned that sunlight is a form of unpolarized light or natural light. But what exactly causes light to become polarized? As light is an electromagnetic wave, it has both an electric field and magnetic […]
Read morePosted on: Friday, May 13th, 2022 In: Learning Optics with Austin
We left off in the interference post using water waves to represent the interference that occurs between light waves. A well known experiment having to do with interference of light is the double-slit experiment. In this experiment, light passes through two slits before reaching a screen. Rather than just one band of light, bands of […]
Read morePosted on: Friday, April 29th, 2022 In: Learning Optics with Austin
Besides explaining rainbows, why model light as a wave? The particle model of light is usually drawn with a particle traveling as a ray. Just by staring at a candle or light bulb however, we know that light travels in all directions. It would be impossible to draw out infinite rays traveling in all directions, […]
Read morePosted on: Friday, April 15th, 2022 In: Learning Optics with Austin
In “What is Light?”, we described light as both a wave and a particle under the conditions of the wave-particle duality. In the previous posts, we have mostly modeled light as a ray when discussing reflection and refraction. Only when we talk about diffraction and wavelength do we mention the wave property of light. While […]
Read morePosted on: Monday, April 4th, 2022 In: Learning Optics with Austin
Besides lenses and mirrors, prisms are another group of common optical elements. White light that enters a prism leaves as many different colors due to the different refractive indexes of each color’s wavelength (a topic that will be covered in further depth in the next post). Besides refracting white light, prisms have another useful property […]
Read morePosted on: Monday, March 21st, 2022 In: Learning Optics with Austin
In the previous post, we looked at how changing the focal lengths produced different images (and virtual images) for SINGLE lenses. Sometimes, however, a system of lenses is needed to produce a desired image. A system is composed of two or more lenses assembled together. A good example of a system is the eyepiece of […]
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