Optics Forum

Post thread

Threads

Undergrad How would light intensity and humidity

  • LoBun
  • · Replies 2 ·
Replies
2

Graduate Faster than light in a material medium?

  • Reshma
  • · Replies 3 ·
Replies
3

High School What Medium Do Light Waves Use in a Vacuum?

  • tech by trade
  • · Replies 10 ·
Replies
10

Graduate What is the relativistic mass of photons in perfect fluids?

  • eNathan
  • · Replies 24 ·
Replies
24

Undergrad What does light's frequency actually mean?

  • KingNothing
  • · Replies 5 ·
Replies
5

High School How do light waves travel if photons don't oscillate like water particles?

  • no idea
  • · Replies 2 ·
Replies
2

Undergrad Two slit interference and diffraction

  • nemzy
  • · Replies 3 ·
Replies
3

Graduate Interference between different eigenmodes of the wave equation

  • Demidov
  • · Replies 1 ·
Replies
1

High School Why can we see virtual images with our eyes if they can't appear on a screen?

  • eax
  • · Replies 3 ·
Replies
3

Undergrad Why is laser light monochromatic?

  • mohdfasieh
  • · Replies 3 ·
Replies
3

Graduate What Determines the Focal Length of an Einzel Lens in TOF Mass Spectrometry?

  • kiwi83
  • · Replies 1 ·
Replies
1

High School UV Light Wavelengths Reaching Earth's Surface

  • Shawnzyoo
  • · Replies 3 ·
Replies
3

Undergrad Permeability of Light: Dependence Factors

  • mustaffarel
  • · Replies 3 ·
Replies
3

Undergrad What is the physical significance of phase or phase difference

  • electromagnet
  • · Replies 3 ·
Replies
3

Undergrad Why in hot weather dry streets can appear to be wet?

  • Steph
  • · Replies 5 ·
Replies
5

Graduate How Does Antenna Gain vs Effective Area Change at Visible Wavelengths?

  • Swamp Thing
  • · Replies 2 ·
Replies
2

Graduate Does specular reflection from a mirror impart force while conserving energy?

  • Bob The Tough
  • · Replies 2 ·
Replies
2

Undergrad Sign Convention for Geometrical Optics

  • maverick280857
  • · Replies 8 ·
Replies
8

Graduate Does a photon accelerate to reach the speed of light?

  • woz
  • · Replies 7 ·
Replies
7

High School Could Doubling Light Speed Really Change Our Universe?

  • Sariaht
  • · Replies 4 ·
Replies
4

Undergrad Does iron inside a black box affect reflected light intensity?

  • sid_galt
  • · Replies 3 ·
Replies
3

High School Why do long wavelengths travel further than short wavelengths?

  • Firefox123
  • · Replies 17 ·
Replies
17

Undergrad How does the amplitude of a light wave vary with wavelength?

  • DB
  • · Replies 15 ·
Replies
15

Undergrad How Do You Calculate the Wavelength Needed to Eject an Electron from Sodium?

  • Kahsi
  • · Replies 7 ·
Replies
7

Graduate Best Common Folk Materials Slowing Light Down?

  • parlous
  • · Replies 5 ·
Replies
5

Graduate Why Do Spinning Liquid Mirrors Assume a Parabolic Shape?

  • freemind
  • · Replies 2 ·
Replies
2

Graduate Combining diode laser beams without interference losses

  • parlous
  • · Replies 17 ·
Replies
17

Graduate How Do Materials with Negative Refractive Index Function?

  • saiarun
  • · Replies 1 ·
Replies
1

Undergrad Is Watching Your Surroundings Like Viewing a Movie at the Speed of Light?

  • Lewis Zack
  • · Replies 3 ·
Replies
3

Undergrad Why don't dispersion occur in glass blocks?

  • Latrommi
  • · Replies 5 ·
Replies
5

High School Do different colors of light travel at different speeds?

  • Moe_the_Genius
  • · Replies 8 ·
Replies
8

Light from Sound: Affordable or Expensive?

  • Mk
  • · Replies 3 ·
Replies
3

Undergrad Does the speed of light actually slow down in glass?

  • buddingscientist
  • · Replies 2 ·
Replies
2

Graduate How Is the Fresnel Double Prism Equation Derived?

  • jh
  • · Replies 1 ·
Replies
1

Graduate Why does rotating the Michelson-Morley apparatus cause a fringe shift?

  • genxhis
  • · Replies 2 ·
Replies
2

High School Reflection of a pulse on a rope with a fixed end

  • Omid
  • · Replies 2 ·
Replies
2

Undergrad Why Do Sparks and Lightning Emit Light?

  • fliptomato
  • · Replies 1 ·
Replies
1

Undergrad How do cold lasers work?

  • derekmohammed
  • · Replies 6 ·
Replies
6

High School Understanding the Basics of Lasers: A Comprehensive Walkthrough

  • QuantumTheory
  • · Replies 3 ·
Replies
3

High School 45' 90' 45')prism will form a laterally inverted image

  • edwin2b
  • · Replies 6 ·
Replies
6

Simulating Circular Polarization with a Christmas Tree Bead Strand

  • DaveC426913
  • · Replies 1 ·
Replies
1

Graduate Questions about Varying Speed of Light (VSL)

  • dand5
  • · Replies 18 ·
Replies
18

Installing Electric Fence for Dog - Need Ideas

  • dtrain
  • · Replies 1 ·
Replies
1

High School Understanding White Light Formation

  • gunblaze
  • · Replies 2 ·
Replies
2

Undergrad What is meant by Copolarization and Cross polarization?

  • vani
  • · Replies 3 ·
Replies
3

Undergrad Faster than the speed of light.

  • voodoomagic
  • · Replies 5 ·
Replies
5

Undergrad Why do objects take on different color tones when placed near each other?

  • EProph
  • · Replies 3 ·
Replies
3

Undergrad Does pushing a long steel rod transmit force faster than light?

  • Yapper
  • · Replies 2 ·
Replies
2

Graduate What Causes Light Speed Variations in Different Materials?

  • berty
  • · Replies 9 ·
Replies
9

Graduate Can Electrons and Photons Really Move by Jumping?

  • Alp_Oztek
  • · Replies 7 ·
Replies
7

Undergrad Difference between spin and polarisation?

  • tozhan
  • · Replies 1 ·
Replies
1

Undergrad Light refraction index equation

  • Moe_the_Genius
  • · Replies 3 ·
Replies
3

Undergrad Physical picture of how single slit diffraction occurs

  • Firefox123
  • · Replies 7 ·
Replies
7

High School What is the range of wavelengths for visible light?

  • nautica
  • · Replies 14 ·
Replies
14

Undergrad Rotating Lens for optimal viewing

  • Dymium
  • · Replies 8 ·
Replies
8

High School Black Light Safety: Risks and Precautions

  • DaveC426913
  • · Replies 1 ·
Replies
1

Undergrad Can Two Speakers Produce Destructive Interference with Longitudinal Waves?

  • Gentec
  • · Replies 2 ·
Replies
2

Graduate How Does a Mirror Reflect Light at the Atomic Level?

  • mwirth
  • · Replies 12 ·
Replies
12

Graduate Complete Destructive Interference?

  • jfrusciante
  • · Replies 6 ·
Replies
6

Undergrad Bi-refraction by calcite crystal

  • Ryoukomaru
  • · Replies 1 ·
Replies
1

High School Is the distance between a trough and crest one wavelength?

  • TheShapeOfTime
  • · Replies 6 ·
Replies
6

Undergrad How Does the Doppler Shift Affect Light When Approaching a Source?

  • daveed
  • · Replies 2 ·
Replies
2

Graduate What are the implications of a negative refractive index in optics?

  • saiarun
  • · Replies 5 ·
Replies
5

High School Why is the speed of light 299,792,458 metres per second?

  • prj45
  • · Replies 9 ·
Replies
9

Undergrad Mirrors and lenses under water

  • benw
  • · Replies 3 ·
Replies
3

Undergrad Does the wavelength change when light passes through glass?

  • rayjohn01
  • · Replies 6 ·
Replies
6

High School What Produces Light and Where Does It Go in a Room?

  • aychamo
  • · Replies 2 ·
Replies
2

High School Firing a Laser Gun at Fish: Aiming with Light Refraction

  • SissyQ19
  • · Replies 1 ·
Replies
1

High School Does light keep reflecting forever between perfect mirrors?

  • Smurf
  • · Replies 1 ·
Replies
1

Undergrad What Is Bilinear Optic and How Does It Relate to Birefringence?

  • member 11137
  • · Replies 1 ·
Replies
1

Undergrad How does schlieren photography work and what does it show?

  • Clausius2
  • · Replies 2 ·
Replies
2

Graduate Why don't we detect the mass of photons if they fill the universe?

  • ExecNight
  • · Replies 24 ·
Replies
24

Undergrad What is the difference between dispersion and diffraction in waves?

  • EIRE2003
  • · Replies 2 ·
Replies
2

High School Refractive index and critical angle

  • Cheman
  • · Replies 11 ·
Replies
11

Graduate Light Propulsion: The Hypothetical Question of Energy Transfer and Velocity

  • The_Thinker
  • · Replies 3 ·
Replies
3

Undergrad Angular spread in diffraction grating

  • profbored
  • · Replies 1 ·
Replies
1

Undergrad Is the moire effect light interference or shadow superposition?

  • loke137
  • · Replies 2 ·
Replies
2

Graduate Interferometer Capabilities for Detecting Wavelength Differences

  • TheAntiRelative
  • · Replies 1 ·
Replies
1

Graduate Fresnel Equations Boundary Conditions

  • ObsessiveMathsFreak
  • · Replies 5 ·
Replies
5

Graduate Is Planck's Constant Truly a Variable in Photon Chemistry?

  • tfleming
  • · Replies 7 ·
Replies
7

Undergrad Optics and Photonics: What is it?

  • DaVinci
  • · Replies 1 ·
Replies
1

Graduate What is the role of EMSFT in predicting photon chemistry?

  • tfleming
  • · Replies 9 ·
Replies
9

Graduate What is the standard frequency of photons used in the double slit experiment?

  • T.Roc
  • · Replies 14 ·
Replies
14

High School Do the suns xrays reach earth?

  • Dilbert
  • · Replies 1 ·
Replies
1

Undergrad Fresnel Biprism Equation Derviation-

  • physicsstudent
  • · Replies 2 ·
Replies
2

Undergrad Beams of light and wave effects .

  • Cheman
  • · Replies 2 ·
Replies
2

Graduate Theory Of The Ionization Of Gases By Laser Beams

  • Nickolas
  • · Replies 1 ·
Replies
1

Graduate Light speed and space-time distortion

  • jlorino
  • · Replies 14 ·
Replies
14

Graduate How Is the Speed of Light Measured in a Recursive Universe?

  • heman
  • · Replies 10 ·
Replies
10

High School Demonstrate diffraction in a ripple tank

  • Cheman
  • · Replies 1 ·
Replies
1

High School How Do You Create and View Stereo Images?

  • inadaze
  • · Replies 3 ·
Replies
3

High School Does Light Travel at the Same Speed in Air and Vacuum?

  • gunblaze
  • · Replies 8 ·
Replies
8

Graduate Do Photons of Different Frequencies Have Varying Masses?

  • Phymath
  • · Replies 14 ·
Replies
14

Undergrad Setting up Young's double slit experiment with a diode laser

  • VantagePoint72
  • · Replies 3 ·
Replies
3

Graduate Faster than light speed - No conflict between classical and relativistic motion

  • ramcg1
  • · Replies 21 ·
Replies
21

Graduate Faster Than Light Theory #759310

  • Gara
  • · Replies 2 ·
Replies
2

High School Faster than light theory #759309

  • malikah
  • · Replies 3 ·
Replies
3

High School Is laser ionizing radiation?

  • Nickolas
  • · Replies 8 ·
Replies
8

High School Why is it that in a mirror that my image is flipped

  • deimos
  • · Replies 4 ·
Replies
4

High School Solution for traveling faster than speed of light

  • Slickchange1313
  • · Replies 12 ·
Replies
12