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High School How is a rainbow formed by water droplets?

  • Chris914
  • · Replies 3 ·
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3

Graduate Conditions for Double-Slit Interference in Quantum Mechanics

  • Robert_G
  • · Replies 1 ·
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1

Graduate Polariton Beams Provide Coherent Energy for 250x Less Power

  • sanman
  • · Replies 1 ·
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1

Graduate Numerical simulation of a Gaussian beam in a circular optical waveguide

  • Aniket1
  • · Replies 3 ·
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3

Undergrad Light and Conservation of Energy

  • paradoxes
  • · Replies 3 ·
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3

Graduate Is the Photon Mass Really Zero or Does It Have a Finite Value?

  • vijayst
  • · Replies 6 ·
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6

Graduate How hard would it be to output a stable beam if a certain wavelength?

  • Nerdydude101
  • · Replies 7 ·
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7

Undergrad Polarization of Laser vs Sunlight

  • nepstein
  • · Replies 1 ·
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1

Graduate Why does a dark object feel hotter to touch than a reflective one?

  • fog37
  • · Replies 10 ·
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10

High School Intensity of natural light after polarization

  • rmfw
  • · Replies 15 ·
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15

Undergrad Why do sparks radiate photons?

  • Jonsson
  • · Replies 1 ·
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1

Graduate How is the energy-frequency relation for photons derived?

  • Hepic
  • · Replies 6 ·
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6

Undergrad Why does a CD split white light into colors like a diffraction grating?

  • Jimmy87
  • · Replies 10 ·
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10

Undergrad Disadvantagês of Stêp Indêx Fibêr

  • shayaan_musta
  • · Replies 8 ·
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8

Graduate Relation for combination of two thick lenses

  • justawebuser
  • · Replies 1 ·
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1

High School Why can you see objects in a dark room with a flashlight if black absorbs all light?

  • RyanXXVI
  • · Replies 13 ·
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13

Graduate Inmarsat analysis for missing flight MH370

  • yuiop
  • · Replies 29 ·
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29

Graduate Can degenerate modes have different resonant frequencies in photonic crystal cavities?

  • shpongle
  • · Replies 3 ·
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3

Graduate Time Domain (Oscilloscope) View of a Photon or Light Wave

  • jeffamm
  • · Replies 13 ·
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13

Undergrad Why is the Sky Blue? Understanding Rayleigh Scattering and Atmospheric Particles

  • jennyjones
  • · Replies 23 ·
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23

Graduate Solving Relay Imaging Problem to Get Image at 370mm

  • test1234
  • · Replies 3 ·
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3

Graduate Can Double Slit Experiment Results Differ with Two Separate Light Sources?

  • Thead
  • · Replies 2 ·
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2

Graduate Matrix description of optical devices

  • naima
  • · Replies 5 ·
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5

High School Converging/diverging lense/mirrors, object in different places, image?

  • tvmakkon
  • · Replies 1 ·
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1

Undergrad Why does light change direction when it slows in a different medium?

  • Manraj singh
  • · Replies 17 ·
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17

Undergrad Best way of measurement sodium wavelength?

  • justawebuser
  • · Replies 2 ·
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2

High School Wavelength difference of sodium d lines?

  • justawebuser
  • · Replies 5 ·
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5

Undergrad Higher Order Diffraction: Why Do Colors Appear Different and Overlap?

  • justawebuser
  • · Replies 2 ·
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2

Undergrad Index of refraction - gas density formula

  • Goodver
  • · Replies 3 ·
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3

Graduate Can we create matter from light?

  • Ryan_m_b
  • · Replies 11 ·
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11

Graduate [Thin-Film Optics] Incident white light to color

  • abstracted6
  • · Replies 9 ·
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9

Graduate Phase shift for reflection at glass-metal interface in beam splitters

  • naima
  • · Replies 2 ·
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2

Graduate Contributors to laser backscatter

  • sparkle_pony
  • · Replies 1 ·
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1

Using UVC Lamps for Banknote Verification: Safety Concerns?

  • Sophia
  • · Replies 5 ·
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5

Undergrad Single slit interference picture

  • Maxo
  • · Replies 7 ·
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7

Graduate Building an Optical Transistor - Can it Work?

  • SpaceDreamer
  • · Replies 2 ·
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2

Graduate Measuring Infrared Irradiance for Solar Research

  • SIM77
  • · Replies 6 ·
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6

Undergrad Why doesn't light cancel itself?

  • maline
  • · Replies 6 ·
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6

Graduate Can Crystals Absorb X-rays and Gamma Rays to Emit RF for Movement Tracking?

  • dislect
  • · Replies 14 ·
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14

Undergrad Could light bending explain the accelerating universe instead of dark energy?

  • switz5678
  • · Replies 13 ·
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13

Undergrad Why do we need to keep lights on?

  • GarageDweller
  • · Replies 8 ·
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8

Undergrad Diffraction grating interference

  • Bengo
  • · Replies 3 ·
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3

Graduate Light through out the home without switch being on for all the time.

  • Meson080
  • · Replies 2 ·
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2

Graduate X-Ray Burning Lens: Why Can't it Focus?

  • lufc88
  • · Replies 3 ·
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3

Undergrad Can any color be represented by a single wavelength?

  • Big-Daddy
  • · Replies 17 ·
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17

Graduate How does Fermat's Principle follow from Huygen's principle?

  • nhmllr
  • · Replies 1 ·
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1

Undergrad What is the relationship between phase and path difference in waves?

  • kira506
  • · Replies 4 ·
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4

Undergrad Calculate back facet reflectivity from measured laser output power

  • dhirhe
  • · Replies 1 ·
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1

Graduate Does Newton's corpuscular theory fail to explain normal incidence reflection?

  • Meson080
  • · Replies 10 ·
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10

Undergrad Reflections in a 2m optical fibre with 60μm core diameter

  • Rahulr2k
  • · Replies 2 ·
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2

Undergrad Is Wavelength Doubling Laser a Real Technique?

  • sparkle_pony
  • · Replies 1 ·
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1

Undergrad Why in Optics total internal reflection happens this way?

  • idmond dantes
  • · Replies 1 ·
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1

Undergrad Calculating shadow path and size for a moving 2D circle with distance from light source

  • chubby92
  • · Replies 1 ·
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1

Graduate Where to Find Maximum SBS Gain Peak in Highly Nonlinear Fiber?

  • eahaidar
  • · Replies 3 ·
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3

Undergrad I have a theory, optical physics related (pinhole optics)

  • Nutrient
  • · Replies 21 ·
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21

Undergrad Difference between Aspherical Lenses types/materials

  • Yurirt94
  • · Replies 13 ·
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13

Undergrad Does focusing light with a lens create a light gradient?

  • query_ious
  • · Replies 4 ·
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4

Undergrad Dark fringe order from position on screen

  • negation
  • · Replies 10 ·
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10

High School How fast does light travel when I turn on my lamp?

  • texasH53D
  • · Replies 3 ·
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3

Graduate Why is the the first order useful?

  • Choisai
  • · Replies 5 ·
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5

Graduate Difference between polarization and phase

  • Choisai
  • · Replies 2 ·
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2

Undergrad Is Radio Wave Diffraction Causing Signal Fading While Driving in City Traffic?

  • MikeGomez
  • · Replies 6 ·
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6

Graduate Why don't photons pass through matter like neutrinos do?

  • etepperman
  • · Replies 8 ·
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8

Undergrad Projecting an image back into a slide projector

  • LuukS
  • · Replies 17 ·
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17

Undergrad Wave equation (t-x/c) term for string with density change

  • mcheung4
  • · Replies 1 ·
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1

Undergrad Lots of questions about optics

  • errwrsysalan
  • · Replies 4 ·
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4

Undergrad How red glass converts incedent light to red

  • Goodver
  • · Replies 3 ·
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3

Undergrad Path differences for constructive and destructive interference

  • kwang
  • · Replies 1 ·
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1

High School Can Atoms be Classified as Dipolar Substances?

  • Prashasti
  • · Replies 6 ·
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6

Undergrad How the interference of light changes if there's a lens?

  • Luck0
  • · Replies 1 ·
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1

High School How should I place three pencils so they cast no shadow throughout the day?

  • jaeson
  • · Replies 11 ·
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11

Graduate What is the Path of Light through Strong Gravity?

  • Grendizer
  • · Replies 35 ·
2
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35

Undergrad Emergent Properties-When is the Superposition Principle Inadequate

  • leeone
  • · Replies 3 ·
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3

Graduate Converging Lasers of Different Wavelengths

  • Yondaime5685
  • · Replies 4 ·
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4

Undergrad Michelson interferometer fringes

  • Goodver
  • · Replies 6 ·
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6

Undergrad When to use ray, wave, and quantum models of light?

  • shayaan_musta
  • · Replies 7 ·
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7

High School Detecting Burned/Distorted Fibers with a Handheld Microscope

  • eahaidar
  • · Replies 10 ·
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10

Undergrad Visualizing Standing Wave Created by Plucking a String

  • Tranceform
  • · Replies 12 ·
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12

Undergrad Fibre optics for use in lighting?

  • James125
  • · Replies 6 ·
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6

High School Does light bend around objects? (Not by gravity or diffraction)

  • peterparker
  • · Replies 4 ·
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4

Graduate High pressure tungsten incandescent light bulbs?

  • James125
  • · Replies 2 ·
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2

Undergrad Advice on buying a laser for 3D modeling

  • regnar86
  • · Replies 4 ·
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4

Undergrad Sound diffraction around obstacles; low and high frequencies

  • climbon
  • · Replies 4 ·
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4

Undergrad Optics: Why not polished surfaces reflect less than polished ones?

  • Daaavde
  • · Replies 9 ·
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9

Undergrad Coherence - A Must for Interference?

  • PFuser1232
  • · Replies 9 ·
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9

Graduate Optical trapping of non-spherical particles

  • Gwinterz
  • · Replies 2 ·
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2

Graduate Transmission of light and velocity of light

  • gemini23
  • · Replies 3 ·
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3

Graduate The Double Slit Interference: How does it relate to the definition of coherence?

  • PFuser1232
  • · Replies 3 ·
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3

Graduate Angular Velocity of a source of light

  • Felipe Doria
  • · Replies 1 ·
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1

Undergrad The Effect of Gravity on Photons

  • jld592
  • · Replies 6 ·
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6

Graduate Is the Classical Wave Explanation of Light Still Relevant in Modern Physics?

  • jaydnul
  • · Replies 3 ·
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3

Undergrad Do all forms of energy behave like light?

  • rmclaug
  • · Replies 12 ·
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12

Graduate Four Wave mixing and split step Fourier method

  • eahaidar
  • · Replies 2 ·
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2

Undergrad Conversion of Light energy to Sound energy

  • Young Learner
  • · Replies 5 ·
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5

High School Why does a magnifying glass focus sunlight to burn paper?

  • thared33
  • · Replies 9 ·
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9

Graduate Measuring Etendue of LED sources

  • Samu
  • · Replies 1 ·
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1

Undergrad Can we produce a white laser from a visible light spectrum?

  • athrun200
  • · Replies 5 ·
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5

Undergrad Why is the second wave of light shorter when a star moves toward you?

  • Manraj singh
  • · Replies 22 ·
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22

Graduate How do different materials interact with light?

  • God Plays Dice
  • · Replies 5 ·
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5

Graduate Does spectral reflectance depend on the surrounding medium?

  • picobyte88
  • · Replies 1 ·
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1