Optics Forum

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High School How are photons able to carry messages?
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High School What explains this potato light socket & battery?
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Undergrad Is the speed of light always constant in nature?
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High School Directing sunlight into the optical fiber
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Undergrad Why Do Some Light Sources Show Clear Interference Patterns While Others Do Not?
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Undergrad How to calculate attenuation for optical fiber bundle?
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Undergrad Why doeslight "turn" when it travels through water?
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Undergrad Refractive index as a function of the concentration of a sugar solution
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Undergrad A Question about Diffraction....
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Undergrad Transmission in Single Mode Waveguide
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Graduate Using multiple mirrors in Michelson Interferometer
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Graduate Multiple reflections and transmissions of light inside a cube
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Undergrad Why was the speed of light even considered to be infinite?
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Undergrad What is the max magnification of 0.5mm film lens.
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High School Do Concave Mirrors Always Form Real Images?
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Undergrad What Is the Nature of Black in the Visible Spectrum VIBGYOR?
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Graduate Can Negative Mass at near Speed of Light go Back in Time?
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Graduate Halogen Lamp Spectrum 12V, 50W MR16: A vs B
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Graduate Campton Scattering: Colour Change Explained
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High School Visible light and light are two different things?
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Graduate Single Slit Fraunhofer Diffraction
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Undergrad Why Does an Electron Release a Photon After Absorption?
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Undergrad How to find the speed of light practically?
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Graduate Thin slits and accuracy of Kirchhoff's diffraction formula
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High School Can Mirrored Solar Arrays Create a Continuous Ion Channel for Energy Transfer?
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Graduate Optical Tweezers and 3D Printing
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High School Rainy Day: Black Clouds and Light
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Undergrad Brewster's law for incident vertically polarised light
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High School Colour Change Problem: Does Wavelength Affect Colour?
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High School Stained Glass Problem: Why Are Low Energy Wavelengths Absorbed?
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Undergrad How does the optical system of a structured light 3D scanner work?
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Undergrad From whence cometh the photon?
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Graduate Using laser to overcome conservation of etendue
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High School Speed and Velocity vs magnitudes
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High School How to Make a Laser That Burns Paper: Tips for Using Multiple Convex Lenses
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Graduate What are the practical limits of constructive interference?
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High School White light vs visible spectrum
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High School Can the Person See the Image Without the Ocular Lens?
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Graduate Decreasing the power density of a laser
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High School Light in a cup (Can you explain this phenomenon?)
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Undergrad Why can't we use opaque object in optical fibres?
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Graduate Superconductivity for light beams?
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Undergrad Image is inverted when I look into a projector lens -- Why?
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Undergrad Two spots with one laser beam in images
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Undergrad Laser and Mirror Thought Experiment
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Undergrad Optics (Intensity of light): Which in degrees, which in rad?
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Undergrad How does a ring laser detect Earth's rotation?
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Undergrad What caused the change in a pilot light at my workplace?
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Graduate Explaining transverse theory of light using EM theory
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Undergrad What materials are safe in a microwave?
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Graduate Negative permittivity of metals – light-trapping and plasmon
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Graduate Near solar mirror for beam propulsion and space solar power
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Undergrad Recent Rainbow - three supernumerary bows
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High School Decrease in Laser Power: Why Is It Happening?
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Undergrad Faster than light communication
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Undergrad Speed of Light in Various Mediums
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Graduate Can Laser Propulsion with the EM Drive and Prisms Actually Work?
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Graduate Questions about Interference Maxima
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Undergrad Explaining Wavelength and Diffraction in Edexcel Physics A-level Q17 (b) i
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High School Optics:Plane mirror and inverted image
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Undergrad How high did my golf ball go? (I have time of flight straight up)
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Undergrad The intensity of x-rays in a Coolidge tube
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Undergrad Recommend a book for Optical physics
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Undergrad Aperature, Numerical Aperature and Speed of Lenses
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High School For OmCheeto (astrospectroscopy)
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Graduate The Diffraction Limited Spot Size with Perfect Focusing - Comments
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High School Can You Create Lightning with Charged Metallic Tips?
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Undergrad What Is the Group Velocity of Evanescent Waves?
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Undergrad A question about the speed of Light in different media....
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High School Why we don't use visible light to cook food?
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Graduate Favorite ways to trap photons or slow down light
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Graduate How does an index of refraction affect the EM field?
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Graduate Superposition's effect on frequency?
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Undergrad Is there a problem with this set of plots?
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Graduate Problem with light grazing along the liquid surface
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High School Centre of curvature of a mirror and the perpendicular
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High School The tangent and perpendicular of a mirror
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Undergrad Why is the image formed next to the object?
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Graduate Tracing a ray of light through a spiral phase plate
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Graduate Is the equivalent lens of two such that f_1+f_2<h divergent?
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Undergrad Diffraction of Sound Waves Through Slit
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Undergrad Minimum deviation in prism spectroscope
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Graduate Image FFT and Lens MTF: Evaluating Final Image Quality
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High School Can a Lens Increase the Power of a Laser Pointer?
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Undergrad How can I identify the appropriate spectral line for Doppler calculation?
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Undergrad Metal platings on glass and reflection in a mirror
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Graduate Optical Interference: LEDs & Coherence
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Graduate How to get a 30um (micrometer) laser diameter?
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Undergrad Do greenhouse gases need to be polar?
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Undergrad Lumens and the Luminosity Function
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Undergrad Why isn't there light exiting anywhere else?
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Graduate Spherically arranged polarization
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Undergrad Determining Appropriate Focal Length
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Undergrad Is there a value for the acceleration of light?
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High School Sweat on Screen, Interference or Refraction?
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Undergrad Waveguide Question: TE & TM Waves Explained
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High School Why do photons pass through particles with a delay
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Undergrad Sun ray brightness quality after mirror reflection
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Undergrad How does Total Internal Reflection in a mm/sm fiber work?
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Graduate Stereoscopic Images and Distance Between Objects
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