Optics Forum

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Do Photons Have Mass or Not?
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Understanding the Speed of Light in a Medium: Does it Really Slow Down?
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9
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Which part of the light wave do we take? (quick question)
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5
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5K
Proof that the speed of light is constant?
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23
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Speed of light in a moving medium
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Physics Faq clarifiaction - light duality
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Questions about lights contradicting properties
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3
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Absorbtion and Reflection of Objects, question
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2
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How To Propogate Uncertainties (Angle of Incidence and Angle of Reflection)
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4
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Can the magnitude of vector be negative?
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4
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Absorbance of UV light by glass
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How to change the polarization of the light
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7K
Compton vs. Raman vs. Thomson Scattering
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3
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17K
Dispersion/Refraction, but WHY?
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13
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Do photons really have a gravitational field like matter?
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When Feynman describes scatterers
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4
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Light speed Impossible Faster than lightProbable?
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5
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8K
Modeling the flight of a frisbee
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4
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Measuring the intensity of light
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4
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Why can't light go thru solids?
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5
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Earth's Surface Area that reflects light
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Questions about lasers and diffraction
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2
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Light absorption in solar cell.
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Light rays in concave lens,moon and eclipses?
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7
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5K
Reflection and Total Internal Reflection
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Do Red Lasers of 314mW Pose a Safety Risk?
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5
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Wavelength -> antenna, waveguides, mirrors ets
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3K
Light Reflection Mystery at the Rijksmuseum Amsterdam
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4
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Can you relate sound frequency's to light frequency's?
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6
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9K
Light, and from whence it cometh.
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8
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Does Refraction through a Glass Slab Cause Different Levels of Image Distortion?
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7
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Light changes frequency depending on
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4
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Comparing Magnetic Attraction: Iron vs. Opposite Polarity
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Confusion with faster than light
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28
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Thin, light, cheap and strong as wood material?
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8
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73K
Non Quantized Light: Could It Produce Energy Below Photon?
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4
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Efficient Laser Beam Expansion Techniques for Optimal Illumination
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8
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Why placing a blue filter in front of a light source will give blue li
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1
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2K
How Does Light Behave When It Passes Through Different Mediums?
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42
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19K
Fading Ink on Book Covers: Sunlight Cause?
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6K
Polarization of Light at Boundary: Exploring the Brewster Angle and Absorption
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11
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4K
Can a 10 Watt Globe be Powered by 24V?
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9
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Hyugens principle and laser wave dispersion
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27
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11K
How much mass does it take before photons will have a stable orbit?
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Help with my large mirror and camera.
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2
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Spectrum of Hot & Cold Fire: How Can It Be?
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Sun Setting Illusion: Explaining Constant Angular Speed
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Lightwave Oven: Why We Heat Food With Microwave
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4
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Light/radio waves radiate in all direction
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5
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Concentration of photons in a beam of light
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11
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11K
Why do some objects reflect more light than others?
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4
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10K
How to understand the image of lens at infinity
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8
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26K
Creating a Computer Flight Model: Best Starting Place for Aerodynamic Theory
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6
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Principle of lightining conductor
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Why does mass not affect gas pressure in ideal gas law?
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3
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10K
Light OR Sound? - Unraveling the Mystery
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3
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What is the cause of my peculiar vision abnormality?
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8
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2K
Why does the wave of color that has a greater index of refraction bend more?
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3
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8K
Help with thin lenses and uncertanty
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5
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What Do Telescope Specifications Like 6x16 and 175/1000m Mean?
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2
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Lightning Rod attached to railing of my balcony
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8
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Why does wavelength affect an object's interaction with waves?
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5
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3K
Unanswered Questions on Light: Control & Visibility
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3
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Strong laser pointers - facts?
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12
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Atmospheric Opacity and laser Attenuation query
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6
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How much energy can a black metal surface absorb from direct sunlight?
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9
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Does Coherent Light Waves Frequency Matter?
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2
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Gravity Accelerating Objects To The Speed Of Light
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12
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Light is known to have a wave-particle duality
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9
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Coherent Light Waves: Interference & Diffraction Explained
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3
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The propagation of light through a vacuum.
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9
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Understanding the Formula for Dark Fringe in Single-Slit Diffraction
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How do photons behave when entering a prism?
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2
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Laser in Outer Space: Will It Go On Forever?
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What is the feasibility of using laser pointers to paint the moon?
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3
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Observations takne at the speed of light
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8
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Can a Laser Light Be Magnified with a Magnifying Glass?
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14
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Explaining a Bath Time Reflection Puzzle
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Is There a Real Difference Between Diffraction and Interference in Physics?
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2
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Poincare sphere and Degree of polarization
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2
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Hanging a mirror with two off-center nails
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22
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23K
Traveling .999999 reapeating the speed of light .
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15
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Understanding Light Polarization: Clearing Up Confusion for Better Comprehension
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5
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How Can You Align a Thin Electrode Parallel to a Surface Without Direct Contact?
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1
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Optical Question: HeNe Beam Through Potassium Permanganate
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Humans Traveling at Light Speed: A Possibility?
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2
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Does a photon experience time or space?
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27
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Single Slit Interference: Explaining the Phenomenon
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Is the group velocity necessarily slower than light (STL)?
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6
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Does Light Amplitude Depend on Frequency?
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Setting a vector to another magnitude
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2
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Does shiny aluminum foil reflect infrared photons?
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3
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Optical phenomena with colliding river rocks
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3
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Introduction to Optics: Books for Grad Students
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2
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Attractive and repulsive light force
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3
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Why does time appear to stop when traveling at the speed of light?
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2
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Diffraction of incoherent beam
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Calculate angle of reflection.
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3
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8K
Why can wireless internet signals pass through walls when visible light cannot?
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5
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21K
Transparency and refractive index
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1
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7K

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