Optics Forum

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Undergrad Question about polarization of light by scattering in the atmosphere
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Undergrad Could the Sun burn an image sensor of a star tracker in space?
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Undergrad Lux-meter, candelas or lux, measuring nits in practice
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Undergrad Reverse Projector: New Tech for Immersive Video Experience
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High School Letter reflection from beer can
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Undergrad How Does Rotating Polarization Work in Optics Experiments?
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Undergrad Russia Claims Laser Weapon Can Destroy Drones: Is it Possible?
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Graduate Diffraction of spherical wave by plane grating
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Graduate Thought experiments suggest problem with published work
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High School Intuitive, conceptual understanding of holography
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3
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Undergrad Calculating Candela Power for LED
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8
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Undergrad Polarizing filter synthesis and dynamics
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High School Can you trap light indefinitely?
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Undergrad Find the interference function for different emission modes
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High School A variation on the Fresnel Spot experiment
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High School Is Infrared Light Invisible to Humans Due to Eye Limitations?
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High School Number of fringes in a 2-slit diffraction pattern
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High School Why does the Sun seem so bright?
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Undergrad Collimating a laser beam with a fixed focal point?
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Undergrad Are there any inexpensive spectrometers?
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Undergrad Interference - two waves of different frequencies - beat velocity
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4
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Undergrad What does a "phase reversal" really do?
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Undergrad Reflectivity of Pure Metals in Vacuum
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Undergrad Finding focal length of the lens using "u-v" method
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Undergrad Experimental demonstration of an absorption spectrum
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Undergrad What does "upright" mean in geometric optics?
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Graduate Structural coloration of a zeolite monolayer
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High School How Can You Safely Observe Bright Light Sources with a DIY Spectroscope?
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Undergrad Help Needed for Lens Selection for Fiber optics
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Graduate A question about photolithography (optical lithography)?
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4
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Undergrad Overlap Integrals: Understand & Learn from a Source
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3
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Graduate Extracting Color from a Spectral Date
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Undergrad Is there any smart material that gets lighter/heavier?
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Graduate Find the Best Zemax Textbook for Professional Optical Engineers
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High School Fermat's principle and refraction -- Possible misunderstanding
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Graduate Phase lag of light in materials
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Undergrad Does Light Have a Measurable Density?
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Undergrad Refractive index vs Temperature
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High School Is light breaking its own speed limit when cornering?
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High School Why does light diffract into only seven colours?
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Undergrad Collimating a fibre-coupled LED light source
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Undergrad On 'A Quarter Waveplate (QWP) rotated between 2 Polarisers'
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Graduate How is phase velocity related to deflection angle?
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Undergrad Do my parabolic mirrors need to be really shiny to reflect infrared?
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Undergrad How does the double-slit pattern change depending on the slits?
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High School Wavelength of a laser beam emerging from a prism
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Undergrad Does light passed through two window screens get polarized?
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Undergrad Curious formula for elliptical polarisation
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Graduate What is the physical dimension of transduction coefficient in photonics?
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Graduate Reflectivity with gradient in refractive index
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Graduate Reflection Instant? Atomic Level Causes Explored
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Undergrad Calculating Intensity in Single Slit Diffraction Experiments
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Undergrad Aberration in Lenses: Formula & Relation Explained
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Undergrad Why does light travel slower in water?
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Graduate Energy problem of light interference
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Undergrad Could a Gaussian beam be described as parallel at a large distance?
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Undergrad Interference and conservation of energy in a resonator
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Undergrad Spherical aberration in Biconvex and Plano Convex lenses
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Graduate Data storage using microtubules?
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High School Why do reflections in water sometimes appear different from what we see?
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Undergrad Is There a Connection Between Rainbows and Holograms?
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Undergrad The reflection of the sunset on the water is redder--Why?
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High School Is there a material that allows visible light and UV light to pass through?
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Undergrad Interference by reflection on a CD
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Undergrad How to "think" of a polarizer in matrix representation?
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Undergrad Correct Formula for "No Fringe Condition" (Michelson Interferometer)
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Undergrad Fresnel equations and conservation of energy (phase shifts)
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Undergrad Umbrella fabric and diffraction pattern
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Undergrad Shorten the lens distance while having same focal length?
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Undergrad Using Diffraction (i.e., Fresnel Zone Plate) to defocus/diverge light
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Undergrad Double slit fringe visibility with sunlight
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High School How far do photons travel inside common lasers?
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Graduate Magnifying diffraction patterns and real images
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Graduate Optimum profile of light pipe exit for narrow beam angle
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Undergrad How Do Electromagnetic Lenses Magnify the Image?
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Graduate Imperfectly Phase-Modulated Light / Residual Amplitude Modulation
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Graduate Weird pattern for a laser beam spot
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Undergrad Single-slit diffraction experiment and the conservation of energy
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High School Light propagation in dense media
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High School Speed of light versus wavelength
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Undergrad Color Theory Equations: Additive Color Mixing & Analytical Luminosity
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High School Does this experiment prove that light speed is actually faster?
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High School The Redness of Red: fact or fiction?
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Graduate Is classical Snell's law with a moving medium solvable?
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Undergrad Feynman's Vol 1 Lecture 26 Principle of Least Time (help with Figure)
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Undergrad How to make the best collimator using a system of lenses?
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High School Discover the Reason Why Light Moves Slower in Water | Fermilab Video Explanation
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High School Newton's Rings central spot brightness
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Undergrad Doppler Effect -- How fast would you need to go for a red light to appear green?
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Undergrad Simulating Star Images for Star Tracker Testing
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Undergrad Optical proprieties of sulfur dioxide in the gaseous state
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Graduate LIF Spectrum: Understand 12 Branches & Subscripts
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Undergrad How Can One Derive the Diffraction Pattern Formula from a 1D Aperture?
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Undergrad Does luminous efficacy differ between direct and reflected sunlight?
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Undergrad How to know what m value to plug into thin film interference equations
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High School Why do rays of light from the Sun appear to be angled?
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Undergrad Compound Microscope System: Magnification Power Explained
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Undergrad What is really happening in collimation of rays?
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High School How does polarisation in nature work?
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Undergrad A ray crossing 2 media of different indices and energy conservation
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