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Undergrad Switching polarizer and analyzer: the order matters -- why?

  • PathEnthusiast
  • · Replies 4 ·
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4

Graduate What exactly is deconvolution doing?

  • Jiayun
  • · Replies 13 ·
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13

Undergrad Questions About Bragg's Law of X-Ray Diffraction

  • Dario56
  • · Replies 54 ·
2
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54

Undergrad 2mm x 2mm mirror array construction - can you help?

  • simonlhill
  • · Replies 2 ·
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2

Undergrad Optics: infinite light source illusion question - can you help?

  • simonlhill
  • · Replies 8 ·
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8

Undergrad How does photodetector output relate to fiber optic cladding refractive index?

  • benagastov
  • · Replies 1 ·
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1

Graduate IR Laser diode focusing and module selection for CSEL Laser pointer

  • Mike Gaffer
  • · Replies 6 ·
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6

High School Does light propagate as a wave of little bullets?

  • lordoftheselands
  • · Replies 34 ·
2
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34

Undergrad May I treat the light from a star as a light beam?

  • Haorong Wu
  • · Replies 11 ·
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11

High School Fresnel reflectance with extinction coefficient without complex numbers

  • kaasisdebaas
  • · Replies 6 ·
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6

Undergrad Light Transmission Through Half-Hollow Sphere

  • rbjjj
  • · Replies 5 ·
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5

High School Does light ever go from the eye to the image?

  • lioric
  • · Replies 17 ·
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17

High School Shouldn't the refracted ray be along the boundary here?

  • Physical_Fire
  • · Replies 5 ·
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5

High School Shape of Lenses -- Why are they always circular?

  • DragonSpear
  • · Replies 12 ·
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12

High School Can a lens expand a narrow visible light spectrum to full spectrum?

  • LightningInAJar
  • · Replies 27 ·
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27

High School To measure light's frequency, do we interact with each crest + trough?

  • syfry
  • · Replies 16 ·
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16

Undergrad Unidentified Luminescent Phenomena (ULP)

  • ZackMI6
  • · Replies 1 ·
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1

Undergrad Why do we use low-coherence light in Optical Coherence Tomography?

  • red65
  • · Replies 1 ·
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1

Undergrad How Can Two Waves with Different Amplitudes Be in Phase?

  • Graffite
  • · Replies 5 ·
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5

Undergrad Why does light still exist after polarization if only one field component passes through?

  • sinus
  • · Replies 10 ·
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10

Undergrad Light refraction diagram for biconvex lens science fair poster

  • Bluesy
  • · Replies 9 ·
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9

Graduate Finite difference method for beam propagation

  • yashabyadav
  • · Replies 1 ·
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1

Graduate Four-way beamsplitter implementation

  • jeremy_rutman
  • · Replies 4 ·
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4

Undergrad Why use a low-index outer layer instead of air for waveguide total internal reflection

  • Rymazon
  • · Replies 2 ·
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2

High School Why don't overlapping light cones from multiple objects blur together on the retina?

  • ndvcxk123
  • · Replies 25 ·
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25

Undergrad How Do Photons Display Particle/Wave Duality in Optical Imaging?

  • ndvcxk123
  • · Replies 12 ·
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12

Undergrad Name for one kind of Czerny-Turner monochromator configuration?

  • jbeale
  • · Replies 3 ·
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3

Undergrad Amplitude of the maximums in single slit diffraction

  • jaumzaum
  • · Replies 3 ·
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3

Undergrad Applications of Virtual objects

  • rishurboi
  • · Replies 9 ·
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9

Undergrad Why is Cherenkov radiation blue? And what about refractive index?

  • .Scott
  • · Replies 3 ·
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3

Undergrad Fabry-Perot Interferometer mirrors

  • dykuma
  • · Replies 7 ·
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7

Undergrad The kinetic energy of proton-electron for a black body

  • sinus
  • · Replies 8 ·
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8

High School What Keeps Photons Traveling Across the Galaxy?

  • Policetac
  • · Replies 13 ·
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13

Undergrad Two mirrors to focus sunrays into a tiny spot -- possible?

  • Nenad K
  • · Replies 6 ·
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6

Graduate Fourier optics model of a 4f system

  • Skaiserollz89
  • · Replies 1 ·
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1

Undergrad Grating Resolving Power of Laser Beams with Gaussian Distribution

  • mikey1234
  • · Replies 2 ·
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2

Undergrad Is everything we see a result of reflected light?

  • Intel Xeon
  • · Replies 18 ·
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18

High School I still don't understand the propagation of light

  • lordoftheselands
  • · Replies 13 ·
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13

Undergrad William Herschel's light experiment

  • sevensages
  • · Replies 15 ·
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15

Undergrad Issues collimating my laser with 4f system

  • skaiser
  • · Replies 9 ·
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9

High School What Are the Dangers of Spectral Lines from EM Sources?

  • braxton
  • · Replies 11 ·
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11

Undergrad Expose a Hidden Message w/ Polarisation Filters

  • Phil the tinkerer
  • · Replies 5 ·
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5

Undergrad Mirror rotates any polarisation by 90°?

  • iorveth_
  • · Replies 6 ·
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6

Undergrad Light's properties (Why isn't the sky violet?)

  • Salles
  • · Replies 28 ·
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28

Undergrad Paraxial ray tracing: fixing image/height w/o knowing stop location

  • phillip_at_work
  • · Replies 3 ·
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3

Undergrad Trying to Understand the Polarization of light

  • leodavinci
  • · Replies 6 ·
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6

Undergrad Why does a spyglass or binoculars zoom in?

  • grindagrom
  • · Replies 17 ·
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17

Undergrad IR Laser makes glowing spot on radiometer vane

  • Swamp Thing
  • · Replies 8 ·
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8

Undergrad How to calculate focal length?

  • francus
  • · Replies 8 ·
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8

Undergrad How does an eye reconstruct an image?

  • Salmone
  • · Replies 9 ·
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9

Undergrad Light coupling from optical fiber to glass?

  • Mary09
  • · Replies 25 ·
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25

Undergrad Intuitive approach to Huygens' principle

  • Cl4r4
  • · Replies 25 ·
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25

High School Microscope for viewing sperm cells at 400x magnification

  • jaketodd
  • · Replies 1 ·
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1

Undergrad Interesting Optical Phenomenon

  • bob012345
  • · Replies 3 ·
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3

High School Why does small wavelength make geometrical optics work?

  • Anish Joshi
  • · Replies 3 ·
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3

High School I don't understand exactly how the propagation of light works

  • lordoftheselands
  • · Replies 17 ·
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17

Graduate How to compute phase gradient from Snell's law?

  • lstnwndrlnd
  • · Replies 1 ·
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1

Undergrad Minimum light bulb wattage for solar simulator

  • joehoy41
  • · Replies 11 ·
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11

Graduate Why does the free end refraction occur after Brewster's angle in TM?

  • jojoe
  • · Replies 3 ·
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3

High School Does the prism equation (i+e = A+δ) apply to all prisms?

  • Fiona Rozario
  • · Replies 11 ·
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11

Undergrad Plane wave decomposition method in scalar optics

  • HUANG Huan
  • · Replies 1 ·
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1

High School What Color Do Mirrors on Earth Appear from Space?

  • accdd
  • · Replies 35 ·
2
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35

Undergrad What is the angle of the Sun on June 21 & Dec 21 at US Zip Code 37129?

  • gary350
  • · Replies 2 ·
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2

Graduate Diffraction from a set of concentric rings with random phase

  • Gezstarski
  • · Replies 2 ·
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2

Undergrad What are the symbolic shapes marked on fundus images?

  • myquestion
  • · Replies 7 ·
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7

Undergrad Are there inherent limits to Interferometer size?

  • biffus22
  • · Replies 5 ·
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5

Undergrad Image appears outside of q -- Lens Maker's Equation confusion

  • Albertgauss
  • · Replies 17 ·
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17

Undergrad Why do I see my real inverted image in a concave mirror?

  • SHASHWAT PRATAP SING
  • · Replies 172 ·
6
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172

High School Do different modes interfere in multimode optical fiber?

  • Xenon02
  • · Replies 37 ·
2
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37

Undergrad Lost Aspheric Lens Design Equation Found

  • halibut
  • · Replies 2 ·
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2

Undergrad Scattering and non-imaging optics

  • ZeroFunGame
  • · Replies 15 ·
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15

Undergrad Difference between Working distance and object distance

  • Aymangh994
  • · Replies 1 ·
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1

Undergrad Total focal length and magnification

  • Aymangh994
  • · Replies 4 ·
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4

High School How to understand the steradians equation for measuring a sphere of light?

  • squeekymouse
  • · Replies 6 ·
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6

Undergrad What Determines the Speed and Clarity of Signals in Wave Physics?

  • Ahmed1029
  • · Replies 6 ·
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6

Undergrad Mathematics for dancing laser beam

  • sergiokapone
  • · Replies 6 ·
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6

Undergrad How can I derive this relation from Snell's law?

  • Ahmed1029
  • · Replies 1 ·
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1

Undergrad Light coupling in fiber optic cables

  • ace1719
  • · Replies 22 ·
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22

Graduate Why does iPhone reflection on wall show H-shaped dark patterns?

  • OliverFroelich
  • · Replies 2 ·
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2

Undergrad Validity of Fresnel Approximation

  • yucheng
  • · Replies 2 ·
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2

Undergrad Using simple lenses to image AFM Probes

  • Aymangh994
  • · Replies 10 ·
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10

Undergrad Hue shifting toward primary colors in darker regions of 3D renders

  • mikejm
  • · Replies 2 ·
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2

Undergrad When does total intensity reach zero in FTIR with multiple wavelengths?

  • Salmone
  • · Replies 3 ·
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3

Undergrad Huge farsightedness/nearsightedness lens

  • karl131
  • · Replies 10 ·
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10

Undergrad How do lumens and lux relate to light output and illumination?

  • Xenon02
  • · Replies 34 ·
2
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34

High School What does "1 diopter of astigmatism" mean?

  • KayT256
  • · Replies 4 ·
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4

Undergrad Why do we always see interference pattern in Michelson interferometer?

  • Salmone
  • · Replies 9 ·
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9

Undergrad Focusing UV light from a 275nm LED down to a small spot

  • anvoice
  • · Replies 10 ·
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10

Undergrad Quetelet rings on LCD displays?

  • Orthoceras
  • · Replies 3 ·
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3

Undergrad Constructive interference of harmonic electromagnetic waves

  • MartinG
  • · Replies 5 ·
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5

High School A friend of mine sent me these pictures showing multiple shadows

  • merlyn
  • · Replies 4 ·
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4

Graduate Radiometric and Photometric units

  • Claude Bile
  • · Replies 4 ·
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4

Undergrad What Causes the Colorful Effects in Polarised Light Waves?

  • physicsguy
  • · Replies 2 ·
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2

Undergrad Homopolar motor teaches about the Lorenz Force

  • heliotrope
  • · Replies 1 ·
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1

Graduate Kirchhoff's Three Laws of Spectroscopy

  • omoplata
  • · Replies 1 ·
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1

Undergrad Do materials have a refractive index for radio waves?

  • bbbl67
  • · Replies 5 ·
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5

Undergrad Lens angle of coverage/image circle

  • Nil
  • · Replies 5 ·
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5

High School Apparent Depth - What remains constant?

  • jaumzaum
  • · Replies 5 ·
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5

Undergrad Diffraction of RF - how is it affected by frequency?

  • Dickie
  • · Replies 5 ·
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5

Undergrad Can you put out a fuse (fire) with a laser?

  • J3J33J333
  • · Replies 5 ·
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5