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Graduate Why does the cold sky appear to reflect in thermal imagery?

  • TheCornishMong
  • · Replies 2 ·
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2

Graduate How Does the Refractive Index Influence Light Interaction with Metals?

  • sudu.ghonge
  • · Replies 1 ·
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1

High School Understanding ray diagrams for concave lenses

  • Kyle91
  • · Replies 3 ·
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3

Undergrad Resolution and Rayleigh's Criteria

  • prettykitty
  • · Replies 2 ·
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2

Graduate Can interferometers be built with multiple light sources?

  • Xilor
  • · Replies 2 ·
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2

Undergrad Is a 100mw Green Laser Too Powerful for Double Slit Experiments and Microscopy?

  • zepp0814
  • · Replies 3 ·
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3

Graduate Determining the penetration levels of visible light

  • ronandsam
  • · Replies 1 ·
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1

Graduate Why is a photon considered a point particle despite having a wavelength?

  • jaydnul
  • · Replies 11 ·
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11

Undergrad Can active infrared recording produce original colors?

  • SpaceBear
  • · Replies 13 ·
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13

Graduate How can I simulate PSF of incoherent light?

  • snowstarlele
  • · Replies 29 ·
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29

Graduate What does this boundary condition mean?

  • HasuChObe
  • · Replies 4 ·
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4

Undergrad Temporal and spatial changes to light when transiting different media

  • mrcotton
  • · Replies 1 ·
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1

High School What propels radio waves and light to travel at their speeds?

  • uperkurk
  • · Replies 15 ·
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15

Undergrad What Causes Scattering in Optics and How Does it Apply to X-rays?

  • compro21
  • · Replies 1 ·
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1

Graduate Microwave photons, when do they become real?

  • Spinnor
  • · Replies 11 ·
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11

High School Do a light and heavy ball roll the same distance on an inclined plane?

  • razal_ak47
  • · Replies 23 ·
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23

Undergrad Converting elliptical polarization to circular polarization

  • vin300
  • · Replies 1 ·
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1

High School Why Is My New Optical Prism Not Showing a Clear Spectrum?

  • Ascendant78
  • · Replies 11 ·
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11

High School Does a Convex Lens Cause Eye Heat When Viewing a Light Source?

  • Cromptu
  • · Replies 6 ·
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6

High School Light travelling through glass.

  • azzkika
  • · Replies 2 ·
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2

Undergrad What happens to emission spectra when photons pass through a medium?

  • Endervhar
  • · Replies 2 ·
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2

Graduate Experiment: Moving Photon Source - Questions & Answers

  • PTopper
  • · Replies 8 ·
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8

Undergrad Diffraction and intensity of fringes

  • question dude
  • · Replies 4 ·
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4

High School Methods to measure the speed of the light

  • honolulu_boy
  • · Replies 15 ·
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15

Undergrad How to measure the wavelength of a light source

  • marcusmiller
  • · Replies 7 ·
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7

Graduate Can someone clarify and shed some light about these two statements

  • jrist29
  • · Replies 3 ·
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3

Undergrad Does unpolarized light lose intensity through a polarizer filter?

  • question dude
  • · Replies 2 ·
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2

Undergrad Is it accurate to refer to invisible radiation as light?

  • SUDOnym
  • · Replies 7 ·
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7

Undergrad How can light interact with atoms?

  • Menaus
  • · Replies 22 ·
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22

High School How does a battery-powered light bulb work?

  • jperentosh
  • · Replies 1 ·
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1

Graduate Photons Are 'Wave-like' in What Way Exactly?

  • sanman
  • · Replies 18 ·
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18

Undergrad Why Do Wave Equations Use Sinθ and Cosθ Interchangeably?

  • Saxby
  • · Replies 3 ·
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3

Undergrad What units should be used for the cauchy dispersion formula?

  • spectral
  • · Replies 6 ·
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6

High School Why are letters reversed left-right in mirrors instead of upside-down?

  • Numeriprimi
  • · Replies 4 ·
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4

Graduate Index of refraction vs frequency

  • e.chaniotakis
  • · Replies 3 ·
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3

Graduate How Can We See the Blue Light of Day *Only*?

  • Islam Hassan
  • · Replies 9 ·
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9

Graduate Green's function and scattering theory

  • Gregg
  • · Replies 9 ·
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9

Undergrad How much light reflects from chrome paint and how much scatters?

  • erickulcyk
  • · Replies 1 ·
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1

Graduate Normalizing the jinc kernel in coherent vs incoherent optical systems

  • Accidently
  • · Replies 12 ·
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12

Graduate What are some different interactions where photons are released?

  • PiChiNietzsch
  • · Replies 2 ·
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2

Undergrad Why use sign convention twice in lens formula derivation and application

  • Sam Morse
  • · Replies 4 ·
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4

High School Sound interference experiments

  • !)("/#
  • · Replies 2 ·
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2

Graduate Can a photon be emitted without a receiver?

  • Enos Oye
  • · Replies 13 ·
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13

Undergrad Finding refractive index from polarization ratio at 37.5°

  • fkf
  • · Replies 3 ·
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3

Undergrad How do Radio Waves work when used for FM or AM Radio transmission?

  • DCLawrence00
  • · Replies 6 ·
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6

Undergrad Why is virtual image not seen when a defective eye is corrected?

  • hasankamal007
  • · Replies 5 ·
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5

High School Photon Basics: Explaining to a 10-Year-Old

  • zinc30
  • · Replies 4 ·
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4

Graduate Does the force of a single photon act in 1 dimension?

  • jcatom
  • · Replies 43 ·
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43

Undergrad Does light exert more force when reflected than when absorbed?

  • AshleyTomo
  • · Replies 3 ·
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3

Graduate Polarization and Poincare circle.

  • yungman
  • · Replies 4 ·
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4

Undergrad Does silvering the outside of a glass rod reflect light traveling inside it?

  • m0022l
  • · Replies 4 ·
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4

Undergrad Can a metal ring and soap solution create expanding bubbles?

  • Manula
  • · Replies 1 ·
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1

Graduate Elastic scattering and target recoil

  • copernicus1
  • · Replies 2 ·
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2

Undergrad Is the Speed of Light (c) Always 3x10^8 m/s in E=hc/λ?

  • sorax123
  • · Replies 5 ·
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5

High School Microwave ovens versus WiFi signals

  • JimiJams
  • · Replies 8 ·
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8

Undergrad Difference between coherent and incoherent light

  • einstein1921
  • · Replies 15 ·
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15

High School The role of refraction in vision

  • mrcotton
  • · Replies 4 ·
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4

Graduate What does r=r' mean in Stokes relations and phase difference?

  • ananth271194
  • · Replies 1 ·
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1

Graduate The complex index of refraction of air

  • makemasu
  • · Replies 1 ·
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1

Graduate Can two high energy photons combine into one photon?

  • zepp0814
  • · Replies 8 ·
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8

Undergrad Time-scale of Compton scattering

  • IxRxPhysicist
  • · Replies 4 ·
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4

High School Diffraction at an object - diagram?

  • ZedCar
  • · Replies 3 ·
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3

High School Why do household mirrors reflect 98% of light while glass reflects only 4%?

  • SUDOnym
  • · Replies 9 ·
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9

Graduate X-ray shielding thickness and detection methods for low-voltage imaging

  • compro21
  • · Replies 3 ·
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3

Graduate Boundary conditions for string with spring at discontinuity

  • artongue
  • · Replies 1 ·
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1

Undergrad Spectral width vs effective width in pulses

  • cytochrome
  • · Replies 3 ·
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3

Graduate Energy of light vs energy of photon

  • xaratustra
  • · Replies 15 ·
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15

High School Does a closed mirrored box stay lit in daylight?

  • Juel
  • · Replies 6 ·
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6

Undergrad Does dispersion depend on wavelength in vacuum or in the material?

  • mathsciguy
  • · Replies 6 ·
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6

Graduate Refractive Index of Gold at Microwave Frequencies

  • CourtJester035
  • · Replies 6 ·
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6

High School White light to different colors

  • fouad89
  • · Replies 2 ·
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2

Undergrad Does refraction lead to energy loss

  • sunrah
  • · Replies 1 ·
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1

Undergrad Why do colored plastics reflect other colors while appearing their own color?

  • PotentialE
  • · Replies 1 ·
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1

Graduate Using Axial Ratio AR to predict R or L hand polarization.

  • yungman
  • · Replies 1 ·
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1

Undergrad Superposition of waves, result visible?

  • A Dhingra
  • · Replies 6 ·
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6

High School Magnifying Glass and Eye Glasses Comparison

  • NewtonsHead
  • · Replies 6 ·
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6

Undergrad Light bouncing in a sealed mirrored cube

  • Ravalanche
  • · Replies 24 ·
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24

Graduate Is a Galaxy Unresolved at 10 Arc Seconds with 15 Arc Second Resolution?

  • Airsteve0
  • · Replies 1 ·
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1

Graduate What Happens When Light Hits a Mirror Traveling Near the Speed of Light?

  • ratchettrack
  • · Replies 7 ·
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7

Undergrad Why do waves reappear after destructive interference?

  • statement
  • · Replies 6 ·
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6

High School Are we not already travelling at the speed of light?

  • ClintWalker
  • · Replies 2 ·
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2

Graduate Does Goodstein's explanation of light polarization in the Caltech video make sense?

  • 2112rush2112
  • · Replies 14 ·
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14

Graduate Grating Spacing With Fourier Optics

  • nanath
  • · Replies 2 ·
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2

High School Optics - Do I live in a smaller world with glasses?

  • nzweers
  • · Replies 9 ·
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9

Undergrad Why are microwaves reflected by the door?

  • Emissive
  • · Replies 18 ·
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18

Undergrad Humming Notes 1/2-lambda apart

  • ahaanomegas
  • · Replies 4 ·
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4

Undergrad Need solution to view through glass at near zero angle

  • lemd
  • · Replies 2 ·
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2

High School Why is the sky grey on a cloudy day?

  • fouad89
  • · Replies 11 ·
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11

Undergrad Apparent and actual radius (Optics)

  • Healthycola
  • · Replies 1 ·
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1

High School Why does a concave mirror show a crisp image directly but blur on a screen?

  • cavis
  • · Replies 2 ·
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2

Undergrad Why Does Light Reemerge with a Third Polarizer?

  • 2112rush2112
  • · Replies 22 ·
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22

Undergrad Laser Pulse Duration @ 2.5kHz FWHM

  • bhartish
  • · Replies 12 ·
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12

Undergrad How can ellipticity angle be negative.

  • yungman
  • · Replies 2 ·
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2

Undergrad Can lasers create visible plasma channels in air?

  • kuartus4
  • · Replies 4 ·
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4

Graduate Ellipsometric measurements on a mirror.

  • Hannavdwerk
  • · Replies 1 ·
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1

Graduate Why phase shift gives opposite lead/lag for space vs time

  • yungman
  • · Replies 11 ·
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11

Undergrad LED Outdoor Lighting Solutions - Bob's Story

  • SIXIMPS1
  • · Replies 5 ·
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5

Undergrad Why can't the focus of a plane mirror be virtual like in a concave mirror?

  • Sam Morse
  • · Replies 2 ·
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2

Undergrad Does light register on a scale in a vacuum chamber?

  • dev70
  • · Replies 6 ·
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6

High School Flight of a badminton shuttlecock

  • ragsubra
  • · Replies 7 ·
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7