Optics Forum

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Undergrad Light waves, polarization and interferometers

  • matrix_204
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6

High School How Many Watts Are Involved in Lightning?

  • pedram
  • · Replies 3 ·
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3

Graduate Theory of light speed as variable with universe size

  • SmarterThanGod
  • · Replies 15 ·
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15

Graduate Can Freezing Light Overcome Limitations in Solid Surfaces?

  • Greg Bernhardt
  • · Replies 9 ·
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9

Undergrad How many lumens is required for this?

  • zoobyshoe
  • · Replies 8 ·
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8

Undergrad Why does wavelength measurement improve with more slits in diffraction experiments?

  • ScienceGirl
  • · Replies 1 ·
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1

High School Does light travel at c in all media or slow down?

  • nautica
  • · Replies 11 ·
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11

Graduate Locking, at the speed of light.

  • pallidin
  • · Replies 4 ·
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4

High School Does Light Actually Have Mass?

  • decibel
  • · Replies 27 ·
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27

Graduate Can Single Photons Ever Exceed the Speed of Light?

  • toe21k
  • · Replies 5 ·
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5

Graduate Why light diffracts and was directed to QED by Feynman

  • AlanPartr
  • · Replies 1 ·
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1

Undergrad Can a fluorescent light bulb be used as an electrical generator?

  • Jdo300
  • · Replies 3 ·
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3

High School Converging and diverging lenses

  • rockind78
  • · Replies 3 ·
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3

Graduate Newton assumed mass of a light particle is approaching zero

  • BLUE_CHIP
  • · Replies 1 ·
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1

High School Why do shadows merge before objects touch?

  • wasteofo2
  • · Replies 1 ·
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1

Undergrad Why is the speed of light constant for all observers?

  • vidovnan
  • · Replies 74 ·
3
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74

Undergrad Is light reflection really new light created by the material?

  • TurdMuppet
  • · Replies 3 ·
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3

High School Will We See a Beam of Light Racing Through the Solar System?

  • Arkady
  • · Replies 11 ·
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11

Graduate Can Light Be a Product of Higher Dimensions?

  • Unit_Zer0
  • · Replies 4 ·
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4

High School How Do Lumens, Lux, and Candela Differ in Measuring Light?

  • cepheid
  • · Replies 2 ·
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2

Undergrad How to Prove AI = AT + AR for Wave Amplitudes?

  • Aaron8153
  • · Replies 1 ·
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1

Undergrad Why Does Light Diffract When Passing Through an Aperture?

  • AlanPartr
  • · Replies 6 ·
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6

High School Can you see light slowed to 17 m/s propagating through a medium?

  • dcl
  • · Replies 1 ·
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1

Relativity/speed of light/gravity

  • DivisionByZero
  • · Replies 2 ·
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2

Undergrad What happens to relativity when light is slowed down?

  • Bartholomew
  • · Replies 23 ·
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23

Undergrad Can Single-Slit Diffraction Occur in Two Dimensions?

  • slpsms6
  • · Replies 2 ·
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2

Graduate Is the speed of light really medium dependent?

  • GENIERE
  • · Replies 28 ·
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28

Graduate Can a Pulsed Plasma Laser Be Created Using Existing Laser Components?

  • zare
  • · Replies 9 ·
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9

High School A car travelling at the speed of lights turns its brights on

  • AtlasX
  • · Replies 18 ·
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18

Graduate What is the Doppler shift equation for light?

  • criznet
  • · Replies 3 ·
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3

Undergrad What does pumping a transition mean in lasers?

  • salsero
  • · Replies 1 ·
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1

Graduate New Geometrical Polar-Ring Solution for Magic Numbered Nuclei

  • Leo
  • · Replies 2 ·
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2

Graduate Is light actually two-dimensional rather than three-dimensional?

  • scott_sieger
  • · Replies 30 ·
2
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30

Graduate How can the Aumic Theory potentially challenge existing understandings of light?

  • PRodQuanta
  • · Replies 12 ·
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12

Undergrad When does light travel from a glowing iron rod to a sheet of paper?

  • scott_sieger
  • · Replies 11 ·
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11

Graduate Coriolis effect - polarised gravity?

  • scott_sieger
  • · Replies 23 ·
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23

Graduate Real world problem for your pleasure.

  • Integral
  • · Replies 2 ·
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2

Graduate Do parallel laser beams converge due to gravity?

  • Imagine
  • · Replies 28 ·
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28

Graduate Can light be made to go faster than c?

  • HIGHLYTOXIC
  • · Replies 13 ·
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13

A little lightning to the head and we have magnification

  • Ivan Seeking
  • · Replies 24 ·
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24

Graduate Light Carries Time: Nature's Compensation

  • HIGHLYTOXIC
  • · Replies 1 ·
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1

Undergrad Intensity and Relative Amplitude

  • yahooid2
  • · Replies 7 ·
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7

Graduate Does Light Speed Relate to Sun's Rate of Burning?

  • mikelus
  • · Replies 3 ·
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3

Graduate Why does time stop when we travel at the speed of light?

  • benzun_1999
  • · Replies 4 ·
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4

High School Does Light Have Mass? Flannigan's Take on Photon Mass

  • Floyd Flanigan
  • · Replies 23 ·
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23

Graduate Photon energy in an expanding Universe

  • Adrian Baker
  • · Replies 9 ·
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9

High School What is the mass of light particles?

  • benzun_1999
  • · Replies 49 ·
2
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49

Undergrad What causes waves to bend around objects?

  • Canum
  • · Replies 5 ·
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5

High School Two-source and single-source double slit requirements for fringe production

  • jimmy p
  • · Replies 2 ·
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2

Undergrad Lights interaction with matter

  • Farn
  • · Replies 14 ·
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14

Undergrad Three forces, each having a magnitude

  • ksn
  • · Replies 1 ·
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1

How much light does your average home mirror reflect?

  • MisterBig
  • · Replies 4 ·
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4

High School Magnitude of g change and mt everest

  • babighurl00
  • · Replies 1 ·
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1

Undergrad How Do Different Light Sources Affect Emission and Absorption Spectra?

  • Exidez
  • · Replies 1 ·
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1

Graduate Does the speed of light vary over time?

  • AtomSmasher
  • · Replies 3 ·
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3

Graduate Is the Mass of a Photon Concentrated on One Side?

  • Pocketwatch
  • · Replies 8 ·
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8

Graduate Question on effects of gravity on light and time

  • ShadowKnight
  • · Replies 5 ·
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5

High School What would I see if I traveled at light speed?

  • shankar
  • · Replies 14 ·
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14

Graduate Quasar Enigmas In 'decresing Light Speed' Cosmolog

  • Juan Casado
  • · Replies 7 ·
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7

Graduate Wave/Particle Duality in Light Quanta

  • VeraLynn
  • · Replies 15 ·
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15

Undergrad How Does Light Interact with Gravity Despite Being Massless?

  • merc-blue
  • · Replies 5 ·
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5

Undergrad Why does red light penetrate polarized filters when others are blocked?

  • Farn
  • · Replies 5 ·
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5

Stoping light or atleast slowing it down

  • bleh
  • · Replies 10 ·
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10

Undergrad Relativity, time and the speed of light

  • jby
  • · Replies 56 ·
2
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56

Undergrad How do you recognize a photon in a detector?

  • ddr
  • · Replies 2 ·
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2

New Theory on the Nature of Light

  • McQueen
  • · Replies 16 ·
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16

Graduate Why Doesn't Light Have Infinite Mass and Energy in Motion?

  • Dejango
  • · Replies 3 ·
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3

Graduate Photons as electromagnetic energy loops vs particle-wave duality

  • D. Ramakuri
  • · Replies 3 ·
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3

Undergrad Understanding Refraction and Snel's Law: Common Questions Answered

  • Nacho
  • · Replies 14 ·
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14

How Can Photons Have Energy Without Mass?

  • ddr
  • · Replies 6 ·
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6

Undergrad Inverse square law .intensity-brightness-luminosity-distance

  • philip_pc
  • · Replies 1 ·
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1

High School Watching Light Travel in a Coil: Is It Possible?

  • dusty8683
  • · Replies 2 ·
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2

Undergrad What function does the sign wave represent in sound and light?

  • Cyberice
  • · Replies 1 ·
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1

High School Why does a wet-looking reflective pool appear on flat roads from a distance?

  • Cyberice
  • · Replies 12 ·
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12

Undergrad Travelling at the speed of light?

  • Einstein
  • · Replies 6 ·
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6

Undergrad Where Does the Energy Go During Deconstructive Interference?

  • wonderland
  • · Replies 8 ·
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8

Graduate Is it possible to increase the speed of light? (transmissions)

  • sabbry
  • · Replies 20 ·
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20

Graduate Can a photon's energy exceed the Planck mass energy?

  • JAL
  • · Replies 19 ·
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19

High School Stopping Microwave Sensors with Aluminum Foil for Homeowners

  • deany100
  • · Replies 12 ·
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12

Graduate How does holographic dispersion create three-dimensional images?

  • mitch bass
  • · Replies 6 ·
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6

Graduate What causes luminescence in sandblasted coated materials?

  • Ash
  • · Replies 3 ·
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3

Besides Sunlight, what else is there that's useable?

  • brum
  • · Replies 12 ·
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12

Undergrad Acceleration of unwinding uniform cylinder suspended by string

  • Sam
  • · Replies 1 ·
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1

Graduate Does Loop Quantum Gravity Suggest Photons Can Travel Faster Than Light?

  • MathematicalPhysicist
  • · Replies 6 ·
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6

Undergrad Could a Light-Transmitting Antenna Revolutionize Communication?

  • Farn
  • · Replies 6 ·
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6

Graduate Can massless particles travel at speeds other than light speed?

  • brum
  • · Replies 31 ·
2
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31

Graduate Does time stop at the speed of light and run backwards faster than light?

  • Jack
  • · Replies 61 ·
3
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61

High School How can you move at the speed of light?

  • Draco
  • · Replies 6 ·
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6

Undergrad What determines how much of a sound wave reflects vs. transmits through a rock wall?

  • Rockazella
  • · Replies 13 ·
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13

High School Catching Up to Light: The Surprising Truth About Traveling at High Speeds

  • chosenone
  • · Replies 10 ·
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10

High School Can water diffraction make something invisible?

  • oozie1
  • · Replies 7 ·
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7

Graduate Measuring the wavelength of light?

  • grounded
  • · Replies 13 ·
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13

Graduate Question on Reducing Dark Noise in Photodiodes

  • eNtRopY
  • · Replies 5 ·
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5

Undergrad A laser is a device that uses light flashes to excite the atoms

  • garytse86
  • · Replies 2 ·
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2

Graduate Is the Speed of Light Affected by Gravity?

  • Les Sleeth
  • · Replies 10 ·
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10

Graduate Can Electricity Enable Faster-Than-Light Travel?

  • chosenone
  • · Replies 1 ·
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1

Undergrad Calculate the energy and wavelength of the photon.

  • shezill
  • · Replies 6 ·
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6

Undergrad Light, black holes and gravity

  • JSK333
  • · Replies 12 ·
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12

Graduate Refraction Index Conventions: Complex Reflection/Transmission Coeff.

  • Josette
  • · Replies 1 ·
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1

High School Why Does Light Get Refracted When Traveling?

  • garytse86
  • · Replies 10 ·
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10