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High School Obtaining spectrum of Sodium from Sodium Vapour Lamp

  • Wrichik Basu
  • · Replies 10 ·
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10

Undergrad How hot does a gas have to be to achieve its emission spectrum?

  • ISamson
  • · Replies 1 ·
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1

Graduate Speed of Light Thought Experiment

  • Jopus Foghlu
  • · Replies 4 ·
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4

Graduate How can light propagate through Hollow optical fiber.

  • KT KIM
  • · Replies 7 ·
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7

Graduate Understanding Infrared Spectroscopy: Analysis of a Recorded Spectrum

  • Alain Ferbere
  • · Replies 2 ·
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2

High School How are photons able to carry messages?

  • Timvanhoomissen
  • · Replies 8 ·
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8

High School How do magnets work in a potato battery light circuit?

  • swampwiz
  • · Replies 4 ·
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4

Undergrad Is the speed of light always constant in nature?

  • stoomart
  • · Replies 13 ·
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13

High School Directing sunlight into the optical fiber

  • aminmix
  • · Replies 8 ·
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8

Undergrad Why Do Some Light Sources Show Clear Interference Patterns While Others Do Not?

  • Trollfaz
  • · Replies 10 ·
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10

Undergrad How to calculate attenuation for optical fiber bundle?

  • Inneedofhelp
  • · Replies 14 ·
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14

Undergrad Why doeslight "turn" when it travels through water?

  • marksyncm
  • · Replies 3 ·
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3

Undergrad Refractive index as a function of the concentration of a sugar solution

  • RickRazor
  • · Replies 2 ·
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2

Undergrad What does maximum diffraction mean when slit width equals wavelength?

  • Kaneki123
  • · Replies 9 ·
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9

Undergrad Can power profile shape be changed in a single mode waveguide?

  • TinaTina
  • · Replies 10 ·
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10

Graduate Using multiple mirrors in Michelson Interferometer

  • rkatcosmos
  • · Replies 7 ·
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7

Graduate Reconstructing light distribution in scintillator cube with multiple internal reflections

  • davidram
  • · Replies 2 ·
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2

Undergrad Why was the speed of light even considered to be infinite?

  • FallenApple
  • · Replies 32 ·
2
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32

Undergrad What is the max magnification of 0.5mm film lens.

  • MJ Lee
  • · Replies 1 ·
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1

High School Do Concave Mirrors Always Form Real Images?

  • uday01
  • · Replies 2 ·
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2

Undergrad What Is the Nature of Black in the Visible Spectrum VIBGYOR?

  • shihab-kol
  • · Replies 51 ·
2
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51

Graduate Can Negative Mass at near Speed of Light go Back in Time?

  • Call me James
  • · Replies 2 ·
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2

Graduate Why does my 12V 50W MR16 halogen lamp spectrum differ from published data?

  • phy_optics
  • · Replies 28 ·
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28

Graduate Why doesn't Compton scattering change the photon's color?

  • Zaya Bell
  • · Replies 3 ·
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3

High School Visible light and light are two different things?

  • revv
  • · Replies 22 ·
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22

Graduate Single Slit Fraunhofer Diffraction

  • Daniel Gallimore
  • · Replies 4 ·
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4

Undergrad Why Does an Electron Release a Photon After Absorption?

  • Timothy Schablin
  • · Replies 4 ·
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4

Undergrad How to find the speed of light practically?

  • Andrii Iermolaiev
  • · Replies 7 ·
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7

Graduate Thin slits and accuracy of Kirchhoff's diffraction formula

  • bknock
  • · Replies 17 ·
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17

High School Can Mirrored Solar Arrays Create a Continuous Ion Channel for Energy Transfer?

  • Chris Nimmons
  • · Replies 11 ·
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11

Graduate Optical Tweezers and 3D Printing

  • CyrusTheAchaemenid
  • · Replies 2 ·
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2

High School Rainy Day: Black Clouds and Light

  • shihab-kol
  • · Replies 5 ·
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5

Undergrad Brewster's law for incident vertically polarised light

  • Wrichik Basu
  • · Replies 10 ·
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10

High School Colour Change Problem: Does Wavelength Affect Colour?

  • Zaya Bell
  • · Replies 3 ·
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3

High School Why does blue stained glass transmit blue light but absorb red and green?

  • Daniel Petka
  • · Replies 9 ·
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9

Undergrad How does the optical system of a structured light 3D scanner work?

  • SnPtL
  • · Replies 1 ·
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1

Undergrad From whence cometh the photon?

  • Mediocrates
  • · Replies 3 ·
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3

Graduate Using laser to overcome conservation of etendue

  • SlowThinker
  • · Replies 1 ·
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1

High School Speed and Velocity vs magnitudes

  • Gurasees
  • · Replies 2 ·
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2

High School Can multiple convex lenses focus a laser beam to burn paper?

  • Scienceislifeforme
  • · Replies 2 ·
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2

Graduate What are the practical limits of constructive interference?

  • rumborak
  • · Replies 2 ·
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2

High School White light vs visible spectrum

  • Mr Genius
  • · Replies 2 ·
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2

High School Can the Person See the Image Without the Ocular Lens?

  • Vibhor
  • · Replies 27 ·
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27

Graduate Decreasing the power density of a laser

  • Ella Reid
  • · Replies 19 ·
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19

High School Light in a cup (Can you explain this phenomenon?)

  • Anshul23
  • · Replies 9 ·
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9

Undergrad Why can't we use opaque object in optical fibres?

  • esha
  • · Replies 8 ·
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8

Graduate Superconductivity for light beams?

  • Tspirit
  • · Replies 39 ·
2
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39

Undergrad Image is inverted when I look into a projector lens -- Why?

  • guyburns
  • · Replies 30 ·
2
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30

Undergrad Two spots with one laser beam in images

  • Fernando
  • · Replies 14 ·
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14

Undergrad Laser and Mirror Thought Experiment

  • ChrisisC
  • · Replies 5 ·
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5

Undergrad Optics (Intensity of light): Which in degrees, which in rad?

  • Const@ntine
  • · Replies 5 ·
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5

Undergrad How does a ring laser detect Earth's rotation?

  • journierman
  • · Replies 4 ·
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4

Undergrad Why does an air pistol cause an oxy-acetylene pilot light to flare up and change color?

  • fleetingmoment
  • · Replies 29 ·
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29

Graduate Why can't electric field be constant in a traveling wave?

  • Pushoam
  • · Replies 8 ·
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8

Undergrad What materials are safe in a microwave?

  • camerart
  • · Replies 7 ·
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7

Graduate Negative permittivity of metals – light-trapping and plasmon

  • shishi
  • · Replies 1 ·
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1

Graduate Near solar mirror for beam propulsion and space solar power

  • RobertGC
  • · Replies 3 ·
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3

Undergrad Recent Rainbow - three supernumerary bows

  • Andy Resnick
  • · Replies 4 ·
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4

High School Decrease in Laser Power: Why Is It Happening?

  • nordmoon
  • · Replies 3 ·
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3

Undergrad Can a rotating cylinder transmit signals faster than light?

  • Ian75
  • · Replies 6 ·
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6

Undergrad Speed of Light in Various Mediums

  • Sullivan Stockwell
  • · Replies 2 ·
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2

Graduate Can Laser Propulsion with the EM Drive and Prisms Actually Work?

  • Misha2010
  • · Replies 9 ·
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9

Graduate Questions about Interference Maxima

  • JohnnyGui
  • · Replies 22 ·
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22

Undergrad Why does diffraction through a microwave gap peak when the gap equals the wavelength?

  • Javeria
  • · Replies 5 ·
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5

High School Optics:Plane mirror and inverted image

  • shihab-kol
  • · Replies 3 ·
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3

Undergrad How high did my golf ball go? (I have time of flight straight up)

  • applepi38
  • · Replies 2 ·
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2

Undergrad The intensity of x-rays in a Coolidge tube

  • Asmaa Mohammad
  • · Replies 3 ·
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3

Undergrad Recommend a book for Optical physics

  • blue_mind
  • · Replies 6 ·
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6

Undergrad Aperature, Numerical Aperature and Speed of Lenses

  • Jamison Lahman
  • · Replies 7 ·
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7

High School For OmCheeto (astrospectroscopy)

  • Andy Resnick
  • · Replies 7 ·
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7

Graduate The Diffraction Limited Spot Size with Perfect Focusing - Comments

  • Charles Link
  • · Replies 12 ·
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12

High School Creating sparks between charged metallic tips

  • physea
  • · Replies 9 ·
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9

Undergrad What Is the Group Velocity of Evanescent Waves?

  • STAR GIRL
  • · Replies 2 ·
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2

Undergrad Why does light speed remain constant within a uniform medium?

  • Kaneki123
  • · Replies 30 ·
2
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30

High School Why we don't use visible light to cook food?

  • Anindya Mondal
  • · Replies 10 ·
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10

Graduate Favorite ways to trap photons or slow down light

  • boxfullofvacuumtubes
  • · Replies 3 ·
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3

Graduate How does an index of refraction affect the EM field?

  • 2sin54
  • · Replies 6 ·
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6

Graduate Superposition's effect on frequency?

  • Mzzed
  • · Replies 6 ·
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6

Undergrad Is there a problem with this set of plots?

  • Spinnor
  • · Replies 1 ·
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1

Graduate Problem with light grazing along the liquid surface

  • GAURAV DADWAL
  • · Replies 3 ·
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3

High School Centre of curvature of a mirror and the perpendicular

  • shihab-kol
  • · Replies 1 ·
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1

High School The tangent and perpendicular of a mirror

  • shihab-kol
  • · Replies 1 ·
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1

Undergrad Why is the image formed next to the object?

  • Wasif Shah
  • · Replies 4 ·
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4

Graduate Tracing a ray of light through a spiral phase plate

  • Spinnor
  • · Replies 4 ·
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4

Graduate Is the equivalent lens of two such that f_1+f_2<h divergent?

  • crick
  • · Replies 3 ·
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3

Undergrad Diffraction of Sound Waves Through Slit

  • gex
  • · Replies 6 ·
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6

Undergrad Minimum deviation in prism spectroscope

  • crick
  • · Replies 1 ·
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1

Graduate How does FFT scaling affect MTF convolution in image quality calculations?

  • Neels
  • · Replies 6 ·
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6

High School Can a Lens Increase the Power of a Laser Pointer?

  • barryj
  • · Replies 6 ·
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6

Undergrad How can I identify the appropriate spectral line for Doppler calculation?

  • jagadeeshr
  • · Replies 6 ·
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6

Undergrad Which metal platings produce 100% reflection like a mirror?

  • Biniamin Piash
  • · Replies 3 ·
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3

Graduate Can two LEDs with overlapping spectra produce interference?

  • Zachariah
  • · Replies 29 ·
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29

Graduate How to get a 30um (micrometer) laser diameter?

  • FourierTransform
  • · Replies 3 ·
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3

Undergrad Do greenhouse gases need to be polar?

  • Maartenc
  • · Replies 3 ·
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3

Undergrad Lumens and the Luminosity Function

  • JohnnyGui
  • · Replies 25 ·
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25

Undergrad Why isn't there light exiting anywhere else?

  • yosimba2000
  • · Replies 3 ·
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3

Graduate Spherically arranged polarization

  • Sang-Hyeon Han
  • · Replies 2 ·
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2

Undergrad Determining Appropriate Focal Length

  • MxwllsPersuasns
  • · Replies 3 ·
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3

Undergrad Is there a value for the acceleration of light?

  • John Clement Husain
  • · Replies 3 ·
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3

High School Sweat on Screen, Interference or Refraction?

  • Biniamin Piash
  • · Replies 5 ·
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5