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High School Isn't a wave what something does and not what something is?

  • revv
  • · Replies 9 ·
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9

Graduate Single photon and double slit experiment

  • photon wave
  • · Replies 9 ·
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9

High School If a car travels at light speed, does light come from its headlights?

  • gary350
  • · Replies 21 ·
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21

Undergrad Michelson interferometer dimensions

  • malak
  • · Replies 1 ·
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1

Undergrad Why adding more polarized filters results in more light passing?

  • flyguille
  • · Replies 13 ·
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13

Undergrad How do we know that light that comes from the stars is in past?

  • shipiz
  • · Replies 7 ·
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7

Graduate Energy loss and evanescent waves in total internal reflection

  • tade
  • · Replies 4 ·
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4

Graduate Can Crystal Symmetry Explain the Lack of Optical Activity in Quartz?

  • Paul Colby
  • · Replies 2 ·
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2

High School How many batteries does it take to light this bulb up?

  • physicsboi12
  • · Replies 17 ·
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17

Undergrad I have problem with a mirror on Michelson interferometer

  • Nikola0123
  • · Replies 2 ·
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2

Undergrad What will stop me from going at the speed of light?

  • Sas_TP123
  • · Replies 6 ·
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6

Undergrad Real image appears in front of the mirror?

  • Fizzizist
  • · Replies 17 ·
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17

Undergrad Simulate other lenses with Time of Flight (ToF) camera

  • aghbar
  • · Replies 22 ·
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22

Undergrad Modes of Optical Fiber propagation

  • Super Sujan
  • · Replies 8 ·
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8

Undergrad 3rd Order Aberrations from Paraxial Rays?

  • Twigg
  • · Replies 7 ·
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7

Graduate Visible light communication modulation schemes?

  • sherzadakhan
  • · Replies 3 ·
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3

Graduate Relating phasors, complex exponentials and I&Q representations

  • Natalie Johnson
  • · Replies 4 ·
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4

Graduate Does Phase Change on Reflection Violate Stokes Relation?

  • tanaygupta2000
  • · Replies 10 ·
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10

High School Do Shadows from Multiple Sticks in a Circle Point in the Same Direction?

  • Odal
  • · Replies 26 ·
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26

Where can I get some hot mirror (near) infrared mirror) film

  • dularaf
  • · Replies 2 ·
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2

Graduate Can a photon travel slow enough to be seen by the naked eye

  • me-Lights
  • · Replies 18 ·
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18

Undergrad How Can I Accurately Fit an Airy Distribution Over Noisy Resonance Data?

  • MatthijsRog
  • · Replies 9 ·
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9

Undergrad Why does the angle between two targets decrease with distance?

  • Odal
  • · Replies 17 ·
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17

Graduate Difference between photon interactions in absorption-induced emission and reflection

  • Super Sujan
  • · Replies 1 ·
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1

Graduate Deriving reflection formula from refraction by substituting negative refractive index

  • Biker
  • · Replies 16 ·
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16

Undergrad Colored Light or Colored Object?

  • Odal
  • · Replies 26 ·
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26

Undergrad Apply Sign Conventions in Optics Problems Using Lens and Mirror Equations?

  • jishnu
  • · Replies 13 ·
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13

Undergrad After a lightning bolt, what happens to the plasma?

  • mk9898
  • · Replies 1 ·
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1

Undergrad Possible to make speckles without a Laser?

  • darthw
  • · Replies 6 ·
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6

Graduate Why no constructive interference between two 1000 Hz speakers

  • Rasmus Nielsen
  • · Replies 12 ·
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12

High School What can I do with an infrared camera?

  • Taulant Sholla
  • · Replies 6 ·
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6

High School How is light reflected or transmitted through 3D objects?

  • Georges
  • · Replies 12 ·
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12

Graduate Does a photon burst have a finite duration and wavelength count?

  • Averyuniquename
  • · Replies 21 ·
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21

Undergrad Fringes observed between the fingers

  • sweet springs
  • · Replies 5 ·
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5

Undergrad Young's double slit: why fringes gets dimmer and inconsistent?

  • Simon George
  • · Replies 4 ·
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4

Graduate Imaging optics and lowest possible angle video projection?

  • mudicokula
  • · Replies 3 ·
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3

Graduate Light entering a shadow by diffraction at a screen edge

  • Lucw
  • · Replies 17 ·
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17

Graduate Intensity as light passes through two quarter-wave plates?

  • Mulz
  • · Replies 5 ·
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5

Graduate When a photon is created, it instantly achieves the speed of light -- How?

  • zuz
  • · Replies 5 ·
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5

Undergrad Does light refraction follow the path of least time?

  • Buckethead
  • · Replies 17 ·
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17

Undergrad How can transverse light waves diffract through slits?

  • Rtenhoor
  • · Replies 17 ·
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17

High School Can a massless object reach light speed?

  • Doubleclick
  • · Replies 15 ·
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15

Graduate Infinitesimal, Snell's law, and ray tracing

  • ytht100
  • · Replies 7 ·
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7

Undergrad Lens Math for a Semicircle and Vesica Piscis?

  • shintashi
  • · Replies 2 ·
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2

High School Obtaining 700nm light wavelength

  • FredFlintstone
  • · Replies 48 ·
2
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48

Undergrad Is the index of refraction constant for a given medium?

  • Phys12
  • · Replies 7 ·
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7

Undergrad Overlaying light beams by one replacing the other where they intersect

  • wosoka
  • · Replies 62 ·
3
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62

Graduate Why reflected sunspot grows nonlinearly with distance on 2.5cm mirror

  • bob012345
  • · Replies 9 ·
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9

Insights Fabry-Perot and Michelson interferometry: a fundamental approach

  • Charles Link
  • · Replies 14 ·
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14

Undergrad Adsorption of a evanescent waves

  • maurice74
  • · Replies 1 ·
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1

Graduate Is there any phenomenon capable of replacing light?

  • Boltzman Oscillation
  • · Replies 2 ·
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2

Undergrad Why do metals and glass both produce mirror images despite different conductivities?

  • DaTario
  • · Replies 10 ·
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10

Graduate Does headland width affect ocean wave refraction in shallow water?

  • Timtam
  • · Replies 22 ·
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22

Graduate What's the superposition principle for group action?

  • Jianbing_Shao
  • · Replies 6 ·
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6

Undergrad Changing the focal plane of a video projection?

  • wosoka
  • · Replies 10 ·
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10

Undergrad Do Lights Move at the Same Speed?

  • Kaleb OLeary
  • · Replies 6 ·
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6

High School Why parts of the laser ray seem brighter than other parts

  • titansarus
  • · Replies 12 ·
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12

Graduate What fraction of long wavelength EM gets through a small hole?

  • Buzz Bloom
  • · Replies 22 ·
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22

Graduate 3D subsurface laser engraving for translucent minerals?

  • Spin Operator
  • · Replies 5 ·
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5

Graduate Rotating mirror system for shifting a beam?

  • wosoka
  • · Replies 14 ·
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14

Undergrad In a rifle scope, why is the reticle at the focal point?

  • Shadow89
  • · Replies 11 ·
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11

Undergrad Velocity in polar coordinates (again)

  • tiago23
  • · Replies 2 ·
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2

Undergrad Collimated light from red dot scopes?

  • Shadow89
  • · Replies 16 ·
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16

Graduate Is the Speed of Light Limited by the Properties of Matter?

  • Jeffrey phalen
  • · Replies 16 ·
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16

Undergrad Does Hyugen's principle apply in three dimensions?

  • Tom79Tom
  • · Replies 6 ·
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6

High School Different size slits in Young's double slit experiment

  • Dima Petrukhin
  • · Replies 1 ·
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1

Graduate Do photons form images everywhere in a room before detection?

  • waves and change
  • · Replies 37 ·
2
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37

Graduate Laser Gravity: Can a Laser Pull Gently?

  • fishin_kitten
  • · Replies 5 ·
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5

Undergrad Nothing can travel faster than the speed of light

  • sAzt71
  • · Replies 13 ·
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13

Graduate Why the speed of light squared?

  • johngalt47
  • · Replies 6 ·
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6

Graduate Conservation of energy of a perfectly decoherent laser

  • K1nem4t1cs
  • · Replies 12 ·
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12

Graduate Elliptical polarization analysis with linear polarizer

  • Pattarasak
  • · Replies 2 ·
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2

High School How to create diffraction gratings from negative film

  • Paddyster
  • · Replies 7 ·
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7

Graduate Was the ultraviolet catastrophe really a physical problem?

  • fox26
  • · Replies 14 ·
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14

Undergrad Does 1064nm light have the same properties regardless of laser source?

  • Dip It In
  • · Replies 16 ·
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16

Graduate Is there free software for simulating near field diffraction

  • Christofer Br
  • · Replies 1 ·
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1

Graduate Propagation of light in a vacuum

  • slow
  • · Replies 27 ·
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27

Graduate Is the Ideal Lens Calculation Patentable?

  • kokes
  • · Replies 29 ·
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29

Undergrad Why doesn't sunlight have infinite energy?

  • another_dude
  • · Replies 25 ·
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25

Undergrad Window blinds - colour depends on window open/closed

  • Thunderfox
  • · Replies 4 ·
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4

Undergrad Lightbulb and mini hydro generator

  • samirgaliz
  • · Replies 7 ·
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7

Undergrad Why does an owl's eye appear to focus light differently?

  • cronnin
  • · Replies 11 ·
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11

High School Simple microscope and convex lens

  • Hydrous Caperilla
  • · Replies 1 ·
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1

Graduate Why amplitude and power reflection coefficients differ at wave interfaces

  • dyn
  • · Replies 14 ·
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14

High School Can light be split by colour accurately?

  • cwinhall
  • · Replies 8 ·
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8

Graduate Relationship between interference and arm length in MZI

  • boxfullofvacuumtubes
  • · Replies 4 ·
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4

Graduate Faster than the speed of light (pulling on a string)?

  • Ozs
  • · Replies 4 ·
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4

Undergrad Does a particle accelerator help solve gravity for spaceflight?

  • Nelli
  • · Replies 3 ·
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3

Undergrad Can a Laser Beam be Repeated Across Multiple Points?

  • rnbguy
  • · Replies 2 ·
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2

Graduate Why Raman spectroscope doesn't use 532nm laser ?.

  • NEETZGr8
  • · Replies 1 ·
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1

High School Why don't cloud shadows over the sea have a visible penumbra?

  • goran d
  • · Replies 7 ·
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7

High School Young's Double slit experiment with different slit sizes

  • PumpkinCougar95
  • · Replies 20 ·
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20

Undergrad How Do Different Diffraction Grating Designs Affect Analysis Results?

  • Paddyster
  • · Replies 1 ·
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1

Undergrad How does a reflection grating work as a diffraction source?

  • Sheldon11
  • · Replies 3 ·
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3

Graduate Bending a laser beam 1 nanometer over 100-1000 metres

  • ZMacZ
  • · Replies 6 ·
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6

Undergrad Why doesn't white light interfere if it contains all wavelengths?

  • RobertDSmeets
  • · Replies 28 ·
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28

Undergrad On the logical-ness of the principle of superposition

  • RubinLicht
  • · Replies 7 ·
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7

Graduate Why do TE/TM reflection coefficients use only parallel field components?

  • Dimani4
  • · Replies 12 ·
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12

Undergrad Principal plane of a thin lens

  • HastiM
  • · Replies 8 ·
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8

Undergrad Parallel illumination for Contact Image Sensor object position detection

  • rich333
  • · Replies 16 ·
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16