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Graduate What's the amount of energy lost in Total Internal Reflection?

May 19, 2018 · Replies 4 · May 21, 2018

Replies: 4

Views: 2K

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

May 19, 2018 · Replies 2 · May 20, 2018

Replies: 2

Views: 2K

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

Apr 21, 2018 · Replies 17 · May 18, 2018

Replies: 17

Views: 6K

Undergrad I have problem with a mirror on Michelson interferometer

May 18, 2018 · Replies 2 · May 18, 2018

Replies: 2

Views: 2K

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

May 15, 2018 · Replies 6 · May 17, 2018

Replies: 6

Views: 2K

Undergrad Real image appears in front of the mirror?

May 9, 2018 · Replies 17 · May 16, 2018

Replies: 17

Views: 8K

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

May 5, 2018 · Replies 22 · May 15, 2018

Replies: 22

Views: 4K

Undergrad Modes of Optical Fiber propagation

May 3, 2018 · Replies 8 · May 14, 2018

Replies: 8

Views: 2K

Undergrad 3rd Order Aberrations from Paraxial Rays?

May 12, 2018 · Replies 7 · May 14, 2018

Replies: 7

Views: 2K

Graduate Visible light communication modulation schemes?

May 13, 2018 · Replies 3 · May 13, 2018

Replies: 3

Views: 1K

Graduate Sinusoids as Phasors, Complex Exp, I&Q and Polar form

May 10, 2018 · Replies 4 · May 12, 2018

Replies: 4

Views: 2K

Graduate Does Phase Change on Reflection Violate Stokes Relation?

May 10, 2018 · Replies 10 · May 11, 2018

Replies: 10

Views: 3K

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

May 10, 2018 · Replies 26 · May 10, 2018

Replies: 26

Views: 2K

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

May 9, 2018 · Replies 2 · May 9, 2018

Replies: 2

Views: 1K

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

May 2, 2018 · Replies 18 · May 8, 2018

Replies: 18

Views: 3K

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

May 5, 2018 · Replies 9 · May 8, 2018

Replies: 9

Views: 4K

Undergrad Question about the angle between two targets as distance increases....

May 7, 2018 · Replies 17 · May 7, 2018

Replies: 17

Views: 3K

Graduate Difference between emission due to absorption and reflection

May 3, 2018 · Replies 1 · May 6, 2018

Replies: 1

Views: 1K

Graduate Turning the refraction formula into reflection: Negative index

Apr 27, 2018 · Replies 16 · May 5, 2018

Replies: 16

Views: 4K

Undergrad Colored Light or Colored Object?

May 3, 2018 · Replies 26 · May 5, 2018

Replies: 26

Views: 3K

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

May 2, 2018 · Replies 13 · May 4, 2018

Replies: 13

Views: 11K

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

May 3, 2018 · Replies 1 · May 3, 2018

Replies: 1

Views: 2K

Undergrad Possible to make speckles without a Laser?

May 1, 2018 · Replies 6 · May 3, 2018

Replies: 6

Views: 1K

Graduate Sound Wave Interference: Investigating Null Results with Sound Level Meter Data

May 1, 2018 · Replies 12 · May 2, 2018

Replies: 12

Views: 2K

High School What can I do with an infrared camera?

May 1, 2018 · Replies 6 · May 2, 2018

Replies: 6

Views: 2K

High School Light Reflection: A 3D Designer's Guide

Apr 23, 2018 · Replies 12 · Apr 27, 2018

Replies: 12

Views: 3K

Graduate What Is the Relationship Between Photon Duration and Wavelength?

Apr 24, 2018 · Replies 21 · Apr 26, 2018

Replies: 21

Views: 3K

Undergrad Fringes observed between the fingers

Apr 16, 2018 · Replies 5 · Apr 24, 2018

Replies: 5

Views: 1K

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

Apr 22, 2018 · Replies 4 · Apr 23, 2018

Replies: 4

Views: 4K

Graduate Imaging optics and lowest possible angle video projection?

Apr 21, 2018 · Replies 3 · Apr 23, 2018

Replies: 3

Views: 2K

Graduate How Does Feynman's Exploration of Light Diffraction Challenge Our Understanding?

Apr 21, 2018 · Replies 17 · Apr 21, 2018

Replies: 17

Views: 2K

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

Apr 17, 2018 · Replies 5 · Apr 21, 2018

Replies: 5

Views: 4K

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

Apr 18, 2018 · Replies 5 · Apr 18, 2018

Replies: 5

Views: 2K

Undergrad Does Snell's Law accurately explain light refraction in water?

Apr 15, 2018 · Replies 17 · Apr 17, 2018

Replies: 17

Views: 2K

Undergrad Light waves through polarizers: transverse or longitudinal?

Apr 9, 2018 · Replies 17 · Apr 16, 2018

Replies: 17

Views: 3K

High School Light speed travel (now "understanding the difference between weight and mass")

Apr 12, 2018 · Replies 15 · Apr 16, 2018

Replies: 15

Views: 2K

Graduate Infinitesimal, Snell's law, and ray tracing

Apr 12, 2018 · Replies 7 · Apr 15, 2018

Replies: 7

Views: 2K

Undergrad Lens Math for a Semicircle and Vesica Piscis?

Apr 14, 2018 · Replies 2 · Apr 14, 2018

Replies: 2

Views: 2K

High School Obtaining 700nm light wavelength

Apr 9, 2018 · Replies 48 · Apr 13, 2018

2

Replies: 48

Views: 9K

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

Apr 7, 2018 · Replies 7 · Apr 9, 2018

Replies: 7

Views: 4K

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

Mar 31, 2018 · Replies 62 · Apr 8, 2018

3

Replies: 62

Views: 5K

Graduate Reflection from a small spherical mirror

Apr 5, 2018 · Replies 9 · Apr 7, 2018

Replies: 9

Views: 3K

Insights Fabry-Perot and Michelson Interferometry: A Fundamental Approach - Comments

Jan 2, 2017 · Replies 14 · Apr 6, 2018

Replies: 14

Views: 3K

Undergrad Adsorption of a evanescent waves

Mar 31, 2018 · Replies 1 · Apr 5, 2018

Replies: 1

Views: 1K

Graduate Is there any phenomenon capable of replacing light?

Apr 5, 2018 · Replies 2 · Apr 5, 2018

Replies: 2

Views: 1K

Undergrad Reflection of light in metallic surface and glass

Mar 25, 2018 · Replies 10 · Apr 4, 2018

Replies: 10

Views: 3K

Graduate Refraction of Ocean waves: Wide Headland vs Narrow

Mar 29, 2018 · Replies 22 · Apr 3, 2018

Replies: 22

Views: 8K

Graduate What's the superposition principle for group action?

Apr 1, 2018 · Replies 6 · Apr 2, 2018

Replies: 6

Views: 1K

Undergrad Changing the focal plane of a video projection?

Mar 31, 2018 · Replies 10 · Apr 2, 2018

Replies: 10

Views: 2K

Undergrad Do Lights Move at the Same Speed?

Mar 28, 2018 · Replies 6 · Apr 1, 2018

Replies: 6

Views: 2K

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

Mar 6, 2018 · Replies 12 · Apr 1, 2018

Replies: 12

Views: 2K

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

Mar 28, 2018 · Replies 22 · Mar 31, 2018

Replies: 22

Views: 3K

Graduate 3D subsurface laser engraving for translucent minerals?

Mar 28, 2018 · Replies 5 · Mar 30, 2018

Replies: 5

Views: 3K

Graduate Rotating mirror system for shifting a beam?

Mar 29, 2018 · Replies 14 · Mar 30, 2018

Replies: 14

Views: 2K

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

Mar 29, 2018 · Replies 11 · Mar 30, 2018

Replies: 11

Views: 3K

Undergrad Velocity in polar coordinates (again)

Mar 21, 2018 · Replies 2 · Mar 29, 2018

Replies: 2

Views: 4K

Undergrad Collimated light from red dot scopes?

Mar 29, 2018 · Replies 16 · Mar 29, 2018

Replies: 16

Views: 3K

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

Mar 22, 2018 · Replies 16 · Mar 28, 2018

Replies: 16

Views: 2K

Undergrad Does Hyugen's principle apply in three dimensions?

Mar 26, 2018 · Replies 6 · Mar 27, 2018

Replies: 6

Views: 2K

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

Mar 25, 2018 · Replies 1 · Mar 25, 2018

Replies: 1

Views: 2K

Graduate How Do Photons and Detectors Shape Our Perception of Images?

Mar 20, 2018 · Replies 37 · Mar 25, 2018

2

Replies: 37

Views: 4K

Graduate Laser Gravity: Can a Laser Pull Gently?

Mar 22, 2018 · Replies 5 · Mar 23, 2018

Replies: 5

Views: 2K

Undergrad Nothing can travel faster than the speed of light

Mar 22, 2018 · Replies 13 · Mar 23, 2018

Replies: 13

Views: 3K

Graduate Why the speed of light squared?

Mar 21, 2018 · Replies 6 · Mar 22, 2018

Replies: 6

Views: 3K

Graduate Conservation of energy of a perfectly decoherent laser

Mar 22, 2018 · Replies 12 · Mar 22, 2018

Replies: 12

Views: 2K

Graduate When I analyze elliptical polarization using a linear polarizer....

Mar 21, 2018 · Replies 2 · Mar 21, 2018

Replies: 2

Views: 2K

High School How to create diffraction gratings from negative film

Mar 15, 2018 · Replies 7 · Mar 18, 2018

Replies: 7

Views: 3K

Graduate Was the Ultraviolet Catastrophe a Real Problem or Just a Fake?

Feb 17, 2018 · Replies 14 · Mar 17, 2018

Replies: 14

Views: 2K

Undergrad Understanding Laser Safety Glasses: Wavelengths, Frequency, and Protection

Mar 14, 2018 · Replies 16 · Mar 17, 2018

Replies: 16

Views: 3K

Graduate Is there free software for simulating near field diffraction

Mar 16, 2018 · Replies 1 · Mar 17, 2018

Replies: 1

Views: 1K

Graduate Propagation of light in a vacuum

Mar 6, 2018 · Replies 27 · Mar 15, 2018

Replies: 27

Views: 5K

Graduate Is the Ideal Lens Calculation Patentable?

Mar 2, 2018 · Replies 29 · Mar 13, 2018

Replies: 29

Views: 3K

Undergrad Why doesn't sunlight have infinite energy?

Mar 11, 2018 · Replies 25 · Mar 13, 2018

Replies: 25

Views: 4K

Undergrad Window blinds - colour depends on window open/closed

Mar 1, 2018 · Replies 4 · Mar 10, 2018

Replies: 4

Views: 2K

Undergrad Lightbulb and mini hydro generator

Mar 8, 2018 · Replies 7 · Mar 8, 2018

Replies: 7

Views: 2K

Undergrad Optics: Focusing Explained with an Owl

Jan 13, 2018 · Replies 11 · Mar 7, 2018

Replies: 11

Views: 2K

High School Simple microscope and convex lens

Mar 5, 2018 · Replies 1 · Mar 6, 2018

Replies: 1

Views: 2K

Graduate Reflection/transmission of waves at interfaces

Mar 3, 2018 · Replies 14 · Mar 6, 2018

Replies: 14

Views: 2K

High School Can light be split by colour accurately?

Mar 5, 2018 · Replies 8 · Mar 5, 2018

Replies: 8

Views: 2K

Graduate Relationship between interference and arm length in MZI

Feb 28, 2018 · Replies 4 · Mar 2, 2018

Replies: 4

Views: 3K

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

Mar 2, 2018 · Replies 4 · Mar 2, 2018

Replies: 4

Views: 2K

Undergrad Why hasn't gravity been solved for space flight

Feb 28, 2018 · Replies 3 · Mar 1, 2018

Replies: 3

Views: 2K

Undergrad Can a Laser Beam be Repeated Across Multiple Points?

Feb 28, 2018 · Replies 2 · Feb 28, 2018

Replies: 2

Views: 1K

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

Feb 28, 2018 · Replies 1 · Feb 28, 2018

Replies: 1

Views: 2K

High School Explaining the Lack of a Visible Edge in Shadows of Clouds over the Sea

Feb 23, 2018 · Replies 7 · Feb 27, 2018

Replies: 7

Views: 2K

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

Feb 24, 2018 · Replies 20 · Feb 26, 2018

Replies: 20

Views: 7K

Undergrad How Do Different Diffraction Grating Designs Affect Analysis Results?

Feb 20, 2018 · Replies 1 · Feb 20, 2018

Replies: 1

Views: 1K

Undergrad Reflection Grating: How Does it Diffract?

Feb 16, 2018 · Replies 3 · Feb 18, 2018

Replies: 3

Views: 3K

Graduate Bending light by use of a strong field...

Feb 15, 2018 · Replies 6 · Feb 15, 2018

Replies: 6

Views: 1K

Undergrad Composition of Light: Questions & Answers

Feb 14, 2018 · Replies 28 · Feb 15, 2018

Replies: 28

Views: 4K

Undergrad On the logical-ness of the principle of superposition

Apr 5, 2016 · Replies 7 · Feb 13, 2018

Replies: 7

Views: 2K

Graduate Definition of transmission & reflection in TE/TM

Feb 12, 2018 · Replies 12 · Feb 12, 2018

Replies: 12

Views: 6K

Undergrad Principal plane of a thin lens

Feb 8, 2018 · Replies 8 · Feb 12, 2018

Replies: 8

Views: 3K

Undergrad Optics question: I need parallel illumination for a Contact Image Sensor (CIS)

Feb 8, 2018 · Replies 16 · Feb 10, 2018

Replies: 16

Views: 2K

Undergrad Plano-convex lens, which side should face the laser source

Feb 9, 2018 · Replies 1 · Feb 9, 2018

Replies: 1

Views: 5K

High School Why do we have minimum deviation of a prism?

Feb 8, 2018 · Replies 9 · Feb 9, 2018

Replies: 9

Views: 2K

Undergrad Where Can I Find Data on the IR Transmission of Silicon and Germanium?

Feb 9, 2018 · Replies 1 · Feb 9, 2018

Replies: 1

Views: 1K

Undergrad To measure the energy density of a (brief) laser pulse

Feb 4, 2018 · Replies 29 · Feb 8, 2018

Replies: 29

Views: 3K

Undergrad Does the picture change if we turn a thin lens around

Feb 8, 2018 · Replies 2 · Feb 8, 2018

Replies: 2

Views: 3K

High School How many energy requires to increase 1℃ of 1 liter of water using MICROWAVE?

Feb 7, 2018 · Replies 2 · Feb 8, 2018

Replies: 2

Views: 2K

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