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Undergrad Pyro Optical Pyrometer by The Pyrometer Instrument Co. - Model/Type?

  • Shane
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Graduate Red shift photons: where does the energy come from?

  • LennoxLewis
  • · Replies 2 ·
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2

Graduate Converting Sellmeier equation to group delay dispersion

  • Voxynn
  • · Replies 1 ·
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1

Graduate Is a bullet at the speed of light lethal?

  • scootermatsi
  • · Replies 7 ·
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7

High School What is the formula for magnitude and what exactly is it?

  • rachiegrl7
  • · Replies 2 ·
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2

Undergrad Can Concentrating Solar Panels Achieve Higher Efficiency with Concave Mirrors?

  • mars2v
  • · Replies 4 ·
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4

Graduate Is it possible to make a closed mirror system?

  • Edward Solomo
  • · Replies 11 ·
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11

Generate Holograms with a Simulator - Get Answers Now

  • Radical Edward
  • · Replies 2 ·
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2

Graduate Math problem in Huygens-Fresnel principle

  • mensa
  • · Replies 2 ·
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2

Undergrad Why aren't interference filters also polarizers?

  • Neo_Anderson
  • · Replies 3 ·
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3

High School What's the difference between real and virtual images?

  • luysion
  • · Replies 1 ·
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1

Undergrad Wave passing medium containing discontinuities?

  • timlee
  • · Replies 6 ·
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6

Undergrad How does a laser beam propel objects in air?

  • Blenton
  • · Replies 6 ·
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6

Graduate Gaussian beam formulations in different textbooks

  • KFC
  • · Replies 3 ·
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3

Undergrad Light velocity change in different medium

  • timlee
  • · Replies 4 ·
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4

Undergrad Does a light pulse get amplified when it goes to a less dense medium?

  • quantum123
  • · Replies 5 ·
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5

Undergrad Can mirrors rotated by a motor reverse a solar-sail spacecraft?

  • cragar
  • · Replies 7 ·
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7

Graduate Ideal destructive interference of two beams - Where is the energy?

  • ManDay
  • · Replies 9 ·
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9

Undergrad Propagation of light in a vaccuum?

  • Pierre007080
  • · Replies 27 ·
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27

Undergrad Why do mirrored sunglasses reflect light while remaining transparent?

  • Pandemonium
  • · Replies 3 ·
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3

Graduate Photonic Crystal Fibres and COMSOL

  • Darksight
  • · Replies 3 ·
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3

Undergrad Does a bullet stabilize in flight by settling into helical motion?

  • DRice.72
  • · Replies 5 ·
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5

Undergrad Time and distance to reach light speed at 7 G acceleration

  • Eddy 7
  • · Replies 9 ·
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9

Undergrad Why Does an Object Appear Blue When All Other Frequencies are Absorbed?

  • KGC
  • · Replies 6 ·
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6

Undergrad Why do non-coherent waves still interfere and create beats?

  • Niles
  • · Replies 13 ·
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13

Graduate How Is Huygens' Principle Derived from Basic Wave and Maxwell's Equations?

  • ibc
  • · Replies 7 ·
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7

Undergrad Do heavy and light cylinders roll the same?

  • Gary_1
  • · Replies 3 ·
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3

Undergrad Does reflected infrared frequency convert back to original color in night vision?

  • rajeshmarndi
  • · Replies 4 ·
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4

High School Can Laser Technology Outpace Radio Signals for Information Transmission?

  • ladeedadeedum
  • · Replies 11 ·
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11

Undergrad If light's length contracts to zero, how does it have velocity?

  • Char. Limit
  • · Replies 18 ·
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18

High School What do they mean by Light being a wave?

  • Dav333
  • · Replies 24 ·
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24

Graduate Laser optical components/setup

  • ponjavic
  • · Replies 6 ·
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6

Graduate Where does energy go in light interference between parallel surfaces?

  • MrFrankie
  • · Replies 15 ·
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15

Undergrad Capturing light photons with the Hubble

  • seeforth
  • · Replies 3 ·
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3

Undergrad Energy apparently equals mass times the speed of light squared

  • blackbird86
  • · Replies 32 ·
2
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32

Graduate Why does a thin lens ray matrix show equal entry and exit displacements?

  • Niles
  • · Replies 11 ·
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11

High School Understanding How Infrared Thermometers Work

  • cragar
  • · Replies 8 ·
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8

Undergrad Calculating Impact Force of Freefalling Objects in Fenestration Testing

  • Steve4446
  • · Replies 5 ·
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5

Undergrad Uncertainty principle - light beam

  • Dav333
  • · Replies 2 ·
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2

Graduate Light some interesting questions and an observation

  • trogan
  • · Replies 61 ·
3
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Graduate Black holes, speed of light and gravity oh my

  • cragar
  • · Replies 15 ·
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15

Graduate Why does Newton's rings have dark center if reflections are 180° out of phase?

  • stringbean
  • · Replies 8 ·
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8

Undergrad Prism Dispersion: Does Light Diffraction Follow Thin Film Rules?

  • stringbean
  • · Replies 2 ·
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2

High School Have you ever wondered about the physics behind the diffraction of moonlight?

  • pmehnati
  • · Replies 3 ·
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3

Graduate Fraunhoffer Diffraction

  • kihr
  • · Replies 4 ·
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4

Undergrad How can light fluctuate electric and magnetic fields if it contains no charge?

  • amaresh92
  • · Replies 6 ·
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6

Graduate What would it look like to travel faster than a photon?

  • fakts
  • · Replies 34 ·
2
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High School Do 60W type A and type B incandescent bulbs output the same light?

  • fuzzMan53
  • · Replies 3 ·
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3

Graduate Where Can I Find Good Resources on Central Force and Scattering?

  • elibj123
  • · Replies 1 ·
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1

Undergrad What is the weight-bearing capacity of lightweight aerogel material?

  • abhimohpra
  • · Replies 8 ·
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8

High School Can a Modified Sound Card Measure the Speed of Light?

  • highwhey
  • · Replies 3 ·
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3

High School Can We Light a Match on the Moon?

  • wavingerwin
  • · Replies 1 ·
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1

Graduate Are photons elastic, and can we measure their gravity along their path?

  • vin300
  • · Replies 25 ·
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25

High School Why rainbow has a shape of arc and why its ends are bent down.

  • paweld
  • · Replies 16 ·
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16

Graduate Light paths through ferrofluid in a magnetic field

  • sirzerp
  • · Replies 18 ·
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18

High School Understanding Human Color Perception

  • JeremyL
  • · Replies 5 ·
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5

Graduate Fresnel diffraction simulation scaling between aperture and image planes

  • richardbruce
  • · Replies 7 ·
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7

Undergrad What are Radiance and Irradiance and how do they differ?

  • JJ123
  • · Replies 1 ·
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1

High School Total magnification of microscope

  • agentas
  • · Replies 5 ·
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5

Undergrad Contact Lens: How to focus light 1mm away

  • clalburn1420
  • · Replies 2 ·
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2

Undergrad How to determine a lens width?

  • clalburn1420
  • · Replies 5 ·
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5

High School Why did Newton believe light was a particle?

  • Neo_Anderson
  • · Replies 8 ·
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8

Graduate Is regular light considered a soliton?

  • FlyTy
  • · Replies 1 ·
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1

Undergrad How can light be both a particle and a wave at the same time?

  • Char. Limit
  • · Replies 2 ·
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2

Undergrad Light and Vision: Photon Direction

  • clalburn1420
  • · Replies 5 ·
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5

Undergrad How can a black hole bend light?

  • ShawnD
  • · Replies 18 ·
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18

Undergrad Does LED voltage affect intensity vs frequency?

  • ShaggyKyle
  • · Replies 3 ·
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3

Undergrad Polarised 3D glasses and an LCD Monitor

  • ratata
  • · Replies 1 ·
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1

Undergrad Does a bullet lose rotational velocity as fast as forward velocity?

  • usdmgtr
  • · Replies 11 ·
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11

Undergrad Finding Green Light Wavelengths for Dissertation

  • Ballo
  • · Replies 3 ·
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3

Undergrad Determining direction of wave propagation from the phase?

  • AxiomOfChoice
  • · Replies 3 ·
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3

Undergrad Refraction and fiber optic cable diameter

  • NPacific
  • · Replies 7 ·
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7

High School How Does Glycerine Make a Bottle Invisible?

  • DavidSnider
  • · Replies 1 ·
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1

Graduate Can Photons Create Black Holes?

  • trini
  • · Replies 1 ·
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1

High School How do overhead projectors project black onto a screen?

  • middlj
  • · Replies 11 ·
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11

High School Does Light Travel in a Single Line or Cone-Like Receiving?

  • merc
  • · Replies 10 ·
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10

Undergrad Why is diffraction most pronounced for objects on the order of the wavelength?

  • lionelwang
  • · Replies 5 ·
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5

Graduate Group delay measurement using Michelson Interferometer

  • sweat100
  • · Replies 11 ·
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11

High School Color and visible light in general

  • JeremyL
  • · Replies 14 ·
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14

Undergrad Relationship between light amplitude and intensity

  • ettojar
  • · Replies 1 ·
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1

Graduate Curving light undergoing redshift

  • cylinder
  • · Replies 14 ·
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14

Undergrad Explanation of laser intensity

  • Thermodave
  • · Replies 3 ·
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3

High School Why is the street light diffuse in fog but sharp in puddle reflection?

  • freakz
  • · Replies 9 ·
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9

Undergrad Material that blocks visible light but not uv light

  • k33g0rz
  • · Replies 6 ·
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6

Graduate Intensity in a Double-Slit problem?

  • Newtime
  • · Replies 4 ·
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4

High School Can microwaves burn metallic objects?

  • wavingerwin
  • · Replies 10 ·
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10

High School Does anyone know a crystal with refractive index of water?

  • MaxL
  • · Replies 1 ·
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1

High School Introductory demonstration materials

  • neomagus00
  • · Replies 3 ·
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3

Undergrad How could you influence the number of photons emitted from a metal

  • JDiorio
  • · Replies 4 ·
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4

High School Why optical density differs from physical density

  • Laven
  • · Replies 3 ·
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3

Undergrad Basic conceptual description of lightspeed having a limit

  • regor60
  • · Replies 8 ·
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8

High School Speed of light in denser and rarer medium.

  • PrincePhoenix
  • · Replies 2 ·
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2

High School Why does a telescope see the moon 1.32 seconds in the past?

  • brentefs@comc
  • · Replies 9 ·
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9

Slit for the Double Slit Experiment

  • skilet
  • · Replies 3 ·
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3

High School Measuring Light Speed - Is Light Massless?

  • lneilson
  • · Replies 4 ·
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4

Undergrad Computing Flight Forces. Im getting so upset

  • Gibbon
  • · Replies 6 ·
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6

Graduate What is the significance of negative index of refraction in modern physics?

  • ZapperZ
  • · Replies 5 ·
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5

Graduate How Far Must Someone Fall in a Cylinder to See the Entrance as a Dot of Light?

  • John Connors
  • · Replies 6 ·
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6

Undergrad How can two 99% reflecting mirrors transmit 100% of light?

  • naes213
  • · Replies 5 ·
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5

Undergrad Photographic 'Circular Polarisers': what are they?

  • sophiecentaur
  • · Replies 4 ·
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4