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High School Why does FFT of a black and white image differ from expected?

  • Ax_xiom
  • · Replies 14 ·
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14

High School Why does thin film color change with angle of monochromatic light?

  • Antoha1
  • · Replies 6 ·
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6

Graduate Free‑Carrier Index Modulation in Thin Transparent Layers at Visible Wavelengths

  • rcc01
  • · Replies 2 ·
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2

Graduate Feasibility of Micro‑Plasma–Induced Refractive‑Index Phase Modulation

  • rcc01
  • · Replies 5 ·
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5

Graduate ZBLAN fiber simulation Matlab

  • Field123
  • · Replies 0 ·
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0

Undergrad Higher magnification calibration slide

  • Notinuse
  • · Replies 5 ·
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5

Undergrad Pentaprism with magnification, which surface is curved?

  • nikosb
  • · Replies 6 ·
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6

High School Volumetric Holographic Displays

  • LightningInAJar
  • · Replies 5 ·
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5

Graduate Physical intuition for FSR dependence on cavity length d in a scanning Fabry-Pérot interferometer

  • eneacasucci
  • · Replies 7 ·
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7

High School Strange reflection on wall from bedroom double glazed window

  • franchester
  • · Replies 9 ·
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9

Undergrad How do I stretch a laser from a beam into a sheet?

  • LightningInAJar
  • · Replies 81 ·
3
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81

Undergrad An Imagined Diffraction Grating

  • desertshaman
  • · Replies 7 ·
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7

Graduate How to model converging illumination through object plane (in ZEMAX)

  • prrx
  • · Replies 1 ·
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1

Graduate Simple math model for a Particle Image Velocimetry system

  • TT_003
  • · Replies 6 ·
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6

High School Highway: Deriving speed from Doppler shift

  • DaveC426913
  • · Replies 20 ·
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20

High School The focal length of the eye and image inversion

  • anuttarasammyak
  • · Replies 12 ·
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12

High School A quartet of epi-illumination methods

  • Andy Resnick
  • · Replies 3 ·
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3

High School Can Light Speed Be Increased by Straightening Its Wave Path?

  • zuz
  • · Replies 11 ·
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11

Undergrad Effective absorption coefficient of gold nanoparticles

  • Luke137
  • · Replies 5 ·
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5

Undergrad Energy of Electromagnetic Waves in Destructive Interference

  • MartinG
  • · Replies 71 ·
3
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71

Undergrad DMD optical Setup: Diffraction-limited resolution

  • Peter_44332
  • · Replies 3 ·
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3

High School Purity of Interference Pattern in a Classical Double-slit Experiment

  • Quarker
  • · Replies 23 ·
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23

Undergrad Why doesn't prism-separated LED white light show a rainbow?

  • Newtons Apple
  • · Replies 40 ·
2
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40

Graduate When should I analyze optical problems using ray tracing vs. wavefront analysis?

  • TJULICHEN
  • · Replies 12 ·
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12

Undergrad Color and appearance of a "pile" of biological viruses

  • Skaperen
  • · Replies 10 ·
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10

Undergrad Problem with light-ray construction

  • psychics_xxx
  • · Replies 4 ·
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4

High School Rainbow light reflection on TV screen from my hand without direct light source

  • Knifeborn
  • · Replies 10 ·
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10

High School Aperiodic Diffraction Grating

  • desertshaman
  • · Replies 3 ·
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3

Undergrad Energy Redistribution in Lorentz Oscillator Model with Pure Radiation Damping

  • aslddmd
  • · Replies 2 ·
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2

High School Deriving Snell's Law

  • WheatNeat
  • · Replies 1 ·
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1

Undergrad Mie scattering in clouds at 940 nm

  • W1VLF
  • · Replies 29 ·
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29

Graduate Infrared spectrophotometer DIY

  • Ludek
  • · Replies 3 ·
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3

Graduate A double slit thought experiment leading to a paradox

  • Gezstarski
  • · Replies 5 ·
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5

Undergrad Weird Depictions of Birefringence with Angle of Incidence 0°

  • greypilgrim
  • · Replies 2 ·
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2

Undergrad Creating White LEDs: Phosphor vs RGB

  • Newtons Apple
  • · Replies 5 ·
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5

High School Does light decelerate instantaneously when entering glass?

  • Dark85
  • · Replies 9 ·
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9

Undergrad Confusion about line pairs per millimeter

  • klasdfjllgr
  • · Replies 4 ·
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4

Graduate Trying to source Photochromic lenses based on laboratory data

  • Vakho
  • · Replies 1 ·
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1

Graduate Effects of coherence length on optical interference filter

  • shiweiliu
  • · Replies 66 ·
3
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66

Undergrad Fresnel Zone Equation Problem

  • sinus
  • · Replies 8 ·
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8

Graduate Tilting mirror in Fourier plane

  • KikiFleck
  • · Replies 9 ·
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9

Graduate Zemax raytracing and which lens element is the STOP

  • OpticsLover
  • · Replies 10 ·
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10

Undergrad Explanation for homemade digital microscope's optical systems?

  • harundurmush
  • · Replies 4 ·
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4

Undergrad Digital Micromirror Device based optical setup

  • Peter_44332
  • · Replies 7 ·
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7

High School The principle of operation and application of optical lenses

  • Anatoly Anatoly
  • · Replies 14 ·
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14

Undergrad Can the wavelength of an EM wave exceed the size of the observable universe?

  • nmz
  • · Replies 17 ·
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17

Undergrad How Can I Expand and Collimate a Laser Pointer Beam Using Basic Optics?

  • Hop-AC8NS
  • · Replies 2 ·
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2

Undergrad How to couple light from a very small source into spectrometer?

  • magic
  • · Replies 10 ·
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10

Undergrad Understanding magnification of concave mirrors for near-eye situation?

  • nikosb
  • · Replies 11 ·
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11

Undergrad LED Detection Range with Night Vision Goggles?

  • r971821
  • · Replies 3 ·
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3

High School How would light work on a mirror very far away?

  • splatcube
  • · Replies 11 ·
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11

Undergrad Is Fluorescence Possible in Twilight?

  • FeatherGlow
  • · Replies 25 ·
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25

Undergrad On Mixing Colors of Light

  • Charles Link
  • · Replies 207 ·
7
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207

Undergrad Why not use dichroic filters in modern solid state cameras?

  • sophiecentaur
  • · Replies 4 ·
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4

Undergrad Using primary color light filters

  • LightningInAJar
  • · Replies 20 ·
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20

High School Interference in Thin Films

  • mariut
  • · Replies 14 ·
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14

Undergrad Snell's law from a mechanical model

  • greypilgrim
  • · Replies 12 ·
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12

Undergrad Dispersion: Why are Sine-like Functions Fundamental?

  • greypilgrim
  • · Replies 6 ·
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6

Undergrad Recreating Spectral Response from 6-Channel Color Sensor

  • AxisCat
  • · Replies 6 ·
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6

High School Difference between holographic paper and diffraction gratings?

  • James2018
  • · Replies 30 ·
2
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30

Graduate Limitations on complex angle of refractions

  • elad
  • · Replies 1 ·
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1

High School Is all EM radiation light?

  • paulb203
  • · Replies 35 ·
2
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35

Graduate Relative efficiency of SHG vs SFG

  • fevemo
  • · Replies 6 ·
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6

Undergrad Why does a spectrometer show a blue spike even on cloudy days?

  • Newtons Apple
  • · Replies 4 ·
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4

Undergrad Why is there a sharp spike of blue light in my spectrometer readings?

  • Newtons Apple
  • · Replies 9 ·
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9

Undergrad Image construction with concave and convex mirrors

  • eneacasucci
  • · Replies 4 ·
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4

Undergrad How to reflect an object at 90 degrees to the glass surface instead of perpendicular to it

  • Hamedi
  • · Replies 18 ·
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18

Graduate Can 3D Holograms Be Created by Exciting Nitrogen Molecules in Air?

  • Jackissimus
  • · Replies 3 ·
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3

Graduate How should the optical diffraction field be solved?

  • TJULICHEN
  • · Replies 8 ·
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8

Graduate The coherence length is much longer than the manufacturer claims

  • gvgpg66
  • · Replies 10 ·
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10

Graduate Optics: how gather and align light from a scene?

  • Betelgeuse_LA
  • · Replies 3 ·
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3

Graduate Aberration with explicit dependance on object coordinates

  • frederic leroux
  • · Replies 4 ·
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4

Graduate Is the Speed of Light Different in a Casimir Vacuum?

  • ranyart
  • · Replies 4 ·
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4

Undergrad TE and TM polarization parallel definition

  • yefj
  • · Replies 1 ·
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1

Undergrad Visibility when looking down through a Glass Bottom Boat

  • gutman
  • · Replies 4 ·
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4

Undergrad Creating a mirror reflection illusion with multiple mirrors

  • Hamedi
  • · Replies 5 ·
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5

Circular light pattern on windows in November afternoon

  • Ulla
  • · Replies 1 ·
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1

High School Huh? Seeing crisp vitreous floaters while using microscope

  • djfontaine
  • · Replies 7 ·
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7

Undergrad Newton's rings at an oblique angle of incidence of light

  • jokPAN
  • · Replies 1 ·
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1

High School What happens to the energy in destructive interference?

  • rocknrollkieran
  • · Replies 6 ·
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6

Graduate Frequency Domain and pixel size

  • houssain95
  • · Replies 1 ·
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1

Undergrad How to interpret the difference in height between two people in this Ames room?

  • zenterix
  • · Replies 4 ·
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4

Undergrad How to calculate wavelength spacing in echelle gratings

  • dartingeyes
  • · Replies 4 ·
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4

Undergrad Condenser lens retrofit for a lighting application

  • PhilR
  • · Replies 24 ·
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24

Undergrad Is Geometrical Optics Essential for a Deeper Understanding of Light?

  • LightPhoton
  • · Replies 10 ·
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10

High School Spherical Lens Model and Proof

  • difalcojr
  • · Replies 2 ·
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2

Undergrad Infinity conditions for Young's interference vs Fraunhofer diffraction

  • AymericNgy
  • · Replies 7 ·
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7

High School Can a magnifying mirror or prism be used somehow as a low-tech reading aid for the visually impaired?

  • David_Bee
  • · Replies 11 ·
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11

Graduate Blackbody Radiation and Complex Refractive Index

  • elad
  • · Replies 6 ·
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6

Graduate Is a diffuse scatterer necessarily a Lambertian emitter?

  • Philip Koeck
  • · Replies 24 ·
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24

Undergrad Looking for information on Verity SD100 monochromator unit

  • Ducatidragon916
  • · Replies 27 ·
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27

Undergrad Why tilting a diffraction grating produces tilted dots

  • Daniel Petka
  • · Replies 3 ·
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3

Graduate Interpretation of a complex angle of refraction

  • elad
  • · Replies 1 ·
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1

Undergrad The double-slit experiment with a pit in the screen

  • Imya
  • · Replies 33 ·
2
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33

Graduate What materials, if any, are transparent to Long Wave IR?

  • shane2
  • · Replies 5 ·
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5

Graduate How to observe difference of L/R rotation intensity of CPL

  • dhqzd
  • · Replies 2 ·
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2

Graduate Increase in numerical aperture leads to a decrease in line width?

  • kololo
  • · Replies 4 ·
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4

Undergrad Ray Tracing Software for Broadband Lasers

  • Adrian Tudini
  • · Replies 2 ·
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2

Undergrad The detection of the carrier-envelope offset frequency (fCEO) of optical signal

  • Lithium_Niobate_Dog
  • · Replies 0 ·
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0

Undergrad Does halving lumens require doubling exposure time?

  • freedda
  • · Replies 17 ·
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17