Optics Forum

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Absolute Zero & Speed of Light
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Can You Measure the Speed of Light at Home Like 19th Century Scientists?
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Why Is Light Considered a Wave When It Travels Without a Medium?
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Determining X-ray strength and exposure
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How Can You Measure Light Wavelengths Using Microscope Slides and Rubber Bands?
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2
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Optics & Resolution: Can I See the Peak?
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8
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Find Parallel Polarized E Field Reflection Direction
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Why Does Light Have a Maximum Speed?
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4
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Photon in a massless mirrored box
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Light Frequency: What is the Lowest/Highest Frequency?
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Refraction at normal incidence
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11
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E = Em sin(kx-wt) and I = T+R what wavelength is reflected wave
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Reflection coefficient (osmosis)
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Cause of Lightning: What is the Real Explanation?
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3
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Diffractive optics and achromaticism
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3
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Why do I look different in pictures versus a mirror?
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6
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10K
Really confused about skylight polarization
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4
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Why Do Rain Clouds Produce Lightning While Normal Clouds Don’t?
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5
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Help needed, no calculations just theory light and waves
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2
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2K
Best way to get a large rectangular magnifying mirror
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10
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Can a High Power Laser Melt a Prism and How to Make a Reflective Missile?
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5
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Is a Math/CS Background Suitable for Graduate Studies in Photonics?
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3
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Photons and human distance perception
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How does UV light pass a glass bulb?
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1
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Where does a photon distort spacetime?
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3
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Interesting Optics Measurements?
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6
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Atmospheric Extinction of Light
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5
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How does rainbow form? And Light Question
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18
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Confused about dispersion (optics)
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9
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4K
Gravitational force affected by refraction?
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1
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2K
Please educate me on light/matter
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5
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4K
Light Reflection: Does Electric Source Affect Places A, B & C?
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5
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Explaining the Speed of Light Coincidence in the Quran: A Scientific Perspective
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2
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[optics] Those weird blue Christmas lights
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11
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11K
Theory Q: "Persistence of Light Inside an Impenetrable Sphere?
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7
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Why is there a lack of lightning during winter?
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25
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33K
Naive question about the speed of light
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4
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2K
Is it only the speed of light in a vacuum that is constant for all observers?
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20
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5K
Calculating Optimum Distance for Focusing Diverging Light
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11
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10K
Total Internal reflection is Glass Prism Question
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3
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6K
Question about light getting through a aperture (full stops, f/#)
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6
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2K
Why is the speed of light constant?
2
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79
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15K
Reflection of light through a wine glass with water
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1
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Calculating focal length for aspherical lenses
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17
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Radio Wave Basics: Generating & Using Information
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1
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What is the actual explanation of diffraction?
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2
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Order of Diffraction Explained: Animation & Detailed Explanation
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3
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Fuel Consumption of a Ship Traveling at Near Light Speed
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38
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8K
If we were to absorb all the incident light falling upon us
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5
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3K
What Are Effective Methods for Mounting a Cylinder Microlens?
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3
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3K
Absorbtion,reflection,and emission.
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1
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Using a solar cell as a qualitative test of laser intensity
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5
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3K
Why does polarized light shift color in reflections on the sea?
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2
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3K
Am I missing something or is this faster than light
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24
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4K
A question concerning lenses and the resulting images
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1
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2K
Can It Be Proven That Optics Field Amplitudes Satisfy Negative Frequencies?
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4
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2K
What is transformer polarity and how does it affect the output?
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2
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6K
Why is wave intensity defined as displacement^2 rather than just its magnitude?
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1
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How a Magnetron Produces Microwaves: A Comprehensive Guide
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2
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Why does light travel so slow?
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6
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5K
Is laser light polarized or unpolarized?
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3
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Single Photon Emission: Examining the Evidence
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6
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How Do Atoms Influence the Direction of Light During Refraction?
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2
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An infrared light that makes a stamp on a the hand visible
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What does polarization really mean?
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2
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How Does Light Interact with a Slit in Single Slit Diffraction?
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10
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Buying a Laser Pointer: What Can It Do?
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16
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Descartes, lunar eclipses, and the speed of light
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1
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Single slit, optics, special case
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6
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Minimizing inter-photon distance in a non-coherent light interfer. experiment-
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4
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Spherical Huygens Waves and Diffraction: Why Does the Situation Look Different?
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1
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Phase velocity: Using the real or modulus of complex index of refraction?
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2
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Does the Mirror Equation Apply to Parabolic Mirrors?
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3
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Unexploited Photons: What Happens to Solar Energy?
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2
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Capturing the speed of sound and speed of light on video.
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4
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If I know the Solar Hour Angle at sunrise, can I calculate twilight by simply -
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3
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Construstive Interference of Waves. Why don't They cancel Out?
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2
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The optics of circular polarizers in photography
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9
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Light absorption and reflection
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What Determines the Physical Size of a Radio Wave's Amplitude?
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1
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How Does Rotating a Polarizing Filter Affect Sky Photography?
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18
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Creating Plasma with Lasers: Can It Be Done?
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2
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Calculation of diffraction picture (partially coherent illumination)
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6
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Can We Measure the Speed of Light in Different Materials?
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11
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Cause of Lightning - Understand How It Happens
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2
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How do scientists control the intensity of fluorescent lights?
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1
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Atmospheric Scattering: Why We See Sunsets Red/Orange/Yellow
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9
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9K
What Causes Ball Lightning and How Does It Work?
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29
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5K
Question about interference/slits/lasers
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9
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Help understanding Refractive Index
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3
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How to represent light as a sinusoidal function
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1
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Build a Homemade Diffraction Grating - Ideas & Buying Guide
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2
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Lightspeed fast, then slowed, then fast again.
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3
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Why Does the Sky Appear Red at Sunrise/Sunset?
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4
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Optical Illusion of Water on Pavement
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8
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Reflections in Transmission lines
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5
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Double Slit Experiment on Refracted light?
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1
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How does light reflect off a moving angled mirror?
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3
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Why Does Single-Slit Diffraction Create a Pattern of Maxima and Minima?
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3
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4K
Has the speed of light remained constant throughout history?
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8
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3K

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