Optics Forum

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White light vs visible spectrum
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Decreasing the power density of a laser
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19
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Light in a cup (Can you explain this phenomenon?)
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9
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Why can't we use opaque object in optical fibres?
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8
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Superconductivity for light beams?
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39
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Image is inverted when I look into a projector lens -- Why?
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30
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Two spots with one laser beam in images
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14
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Laser and Mirror Thought Experiment
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5
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Optics (Intensity of light): Which in degrees, which in rad?
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5
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How does a ring laser detect Earth's rotation?
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4
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What caused the change in a pilot light at my workplace?
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29
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Explaining transverse theory of light using EM theory
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What materials are safe in a microwave?
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7
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Negative permittivity of metals – light-trapping and plasmon
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1
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Near solar mirror for beam propulsion and space solar power
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3
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Decrease in Laser Power: Why Is It Happening?
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3
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Faster than light communication
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6
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Speed of Light in Various Mediums
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2
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Can Laser Propulsion with the EM Drive and Prisms Actually Work?
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9
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Questions about Interference Maxima
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22
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Explaining Wavelength and Diffraction in Edexcel Physics A-level Q17 (b) i
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5
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Optics:Plane mirror and inverted image
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3
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How high did my golf ball go? (I have time of flight straight up)
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2
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The intensity of x-rays in a Coolidge tube
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3
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Recommend a book for Optical physics
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6
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Aperature, Numerical Aperature and Speed of Lenses
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7
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The Diffraction Limited Spot Size with Perfect Focusing - Comments
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12
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Can You Create Lightning with Charged Metallic Tips?
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9
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2K
A question about the speed of Light in different media....
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30
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Why we don't use visible light to cook food?
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10
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Favorite ways to trap photons or slow down light
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3
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How does an index of refraction affect the EM field?
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6
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1K
Superposition's effect on frequency?
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6
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2K
Problem with light grazing along the liquid surface
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3
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Centre of curvature of a mirror and the perpendicular
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1
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1K
The tangent and perpendicular of a mirror
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1
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Tracing a ray of light through a spiral phase plate
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4
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Is the equivalent lens of two such that f_1+f_2<h divergent?
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3
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1K
Diffraction of Sound Waves Through Slit
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6
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Image FFT and Lens MTF: Evaluating Final Image Quality
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6
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Can a Lens Increase the Power of a Laser Pointer?
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6
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3K
Metal platings on glass and reflection in a mirror
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3
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2K
Optical Interference: LEDs & Coherence
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29
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How to get a 30um (micrometer) laser diameter?
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3
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2K
Do greenhouse gases need to be polar?
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3
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Why isn't there light exiting anywhere else?
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3
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Spherically arranged polarization
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2
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864
Is there a value for the acceleration of light?
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3
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981
Sweat on Screen, Interference or Refraction?
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5
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1K
Why do photons pass through particles with a delay
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6
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2K
Sun ray brightness quality after mirror reflection
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2
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How does Total Internal Reflection in a mm/sm fiber work?
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3
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Analyzing Brightness in Series Lightbulb Circuits
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4
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How does gamma photon ionization affect ion creation and wavelength?
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6
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2K
S vs. P polarization (classical EM)
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4
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Intensity of p-polarized light through stack of plates
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Rutherford scattering and momentum
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1
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Generating light by using the energy from a yoyo
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4
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Constant frequency of light and connection to QM
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3
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Optical system with a medium different from air
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1
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Rotate only H-Pol Component of Light beam by 90 degrees
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11
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Is there such a one-way mirror?
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6
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Setting up a circuit to drive a Laser Diode
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3
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1K
External focus in an optical system
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11
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Superposition Proof: Understanding Angle of Sin
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6
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Optics Research: Focus Light to <5mm, Cheap Lens Solutions
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2
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Apply Fermat's principle to a Concave mirror
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1
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3K
Is the Photon Riding on an Electromagnetic Wave?
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4
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Energy Loss During Total Internal Reflection
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14
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Plano convex lenses and focal length
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7
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8K
Can a laser be effective in a sandstorm or through ash?
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4
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1K
Why can you solve system of lenses combining the effects?
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1
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1K
Do Ghostly Entities Have Mass Like My Reflection or Shadow?
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5
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What if the speed of light were not constant?
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3
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Understanding the Behavior of EM Waves: A Scientist's Perspective
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20
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Why Does X-Ray Scatter at Angle 2dsinθ?
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5
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Significance of terms of acceleration in polar coordinates
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3
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Designing a planocovex PMMA lens
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3
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Understanding laser power terminology
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9
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How do sharp ended lightning rods reduce the probability of lightning strikes?
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13
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Refraction of IR "light" in CCD sensors SiO2 layer
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9
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Is lead salvaged from hospital x-ray shielding safe?
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4
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Why there isn't a scattered photon in the Pe effect?
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6
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Is the Acousto-Optic Effect correlated to wavelength/colour?
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5
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Faster than Light... Superluminal Group Velocity
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2
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Extreme focus of a radially polarized beam
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5
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Polarizers and Analyzers in optics
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1
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Light travels only in one direction material?
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15
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Uncovering the Source of Extra 267 J in Standard Incandescent Light Bulb
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34
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Why do concerts not impact the way we see light?
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10
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Thin film interference - why thin, exactly?
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8
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What is the difference between single-mode and multimode lasers?
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1
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Shining Monochromatic Light on a strawberry....
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6
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Light as a Constant: Examining the Paradox
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3
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Red laser erases on glow in the dark surfaces?
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14
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Effect of IR blocking nano coating atop solar reflectors....
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7
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Thin lens approximation and Apparent depth
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20
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Is light speed limit an artifact of the math of measurement
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10
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Relative Humidity (RH) affecting atmospheric attenuation of light?
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6
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3K
Software for laser simulations
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2
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1K

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