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

Jun 5, 2014 · Replies 6 · Jun 5, 2014

Replies: 6

Views: 3K

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

Jun 3, 2014 · Replies 7 · Jun 4, 2014

Replies: 7

Views: 2K

Undergrad Polarization of Laser vs Sunlight

Jun 2, 2014 · Replies 1 · Jun 2, 2014

Replies: 1

Views: 2K

Graduate Why do dark objects feel hotter than reflective objects?

May 31, 2014 · Replies 10 · Jun 2, 2014

Replies: 10

Views: 3K

High School Intensity of natural light after polarization

May 31, 2014 · Replies 15 · Jun 1, 2014

Replies: 15

Views: 8K

Undergrad Why do sparks radiate photons?

Jun 1, 2014 · Replies 1 · Jun 1, 2014

Replies: 1

Views: 2K

Graduate Proof of E=h*f: Energy of Photons

May 29, 2014 · Replies 6 · May 30, 2014

Replies: 6

Views: 2K

Undergrad How does a CD act like a diffraction grating?

May 29, 2014 · Replies 10 · May 29, 2014

Replies: 10

Views: 4K

Undergrad Disadvantagês of Stêp Indêx Fibêr

May 27, 2014 · Replies 8 · May 29, 2014

Replies: 8

Views: 1K

Graduate Relation for combination of two thick lenses

May 29, 2014 · Replies 1 · May 29, 2014

Replies: 1

Views: 3K

High School Why Does Black Absorb Light Without Reflection in a Dark Room?

May 26, 2014 · Replies 13 · May 28, 2014

Replies: 13

Views: 3K

Graduate Inmarsat analysis for missing flight MH370

Mar 24, 2014 · Replies 29 · May 27, 2014

Replies: 29

Views: 7K

Graduate Degenerate Modes in Photonic Crystal Cavities: Examining Resonant Frequencies

May 22, 2014 · Replies 3 · May 27, 2014

Replies: 3

Views: 3K

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

May 23, 2014 · Replies 13 · May 26, 2014

Replies: 13

Views: 3K

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

May 14, 2014 · Replies 23 · May 26, 2014

Replies: 23

Views: 8K

Graduate Solving Relay Imaging Problem to Get Image at 370mm

May 26, 2014 · Replies 3 · May 26, 2014

Replies: 3

Views: 4K

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

May 25, 2014 · Replies 2 · May 25, 2014

Replies: 2

Views: 2K

Graduate Matrix description of optical devices

May 22, 2014 · Replies 5 · May 25, 2014

Replies: 5

Views: 3K

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

May 25, 2014 · Replies 1 · May 25, 2014

Replies: 1

Views: 2K

Undergrad Why Does Light Change Its Path When Speed Alters in Different Media?

May 16, 2014 · Replies 17 · May 25, 2014

Replies: 17

Views: 3K

Undergrad Best way of measurement sodium wavelength?

May 23, 2014 · Replies 2 · May 23, 2014

Replies: 2

Views: 1K

High School Wavelength difference of sodium d lines?

May 22, 2014 · Replies 5 · May 23, 2014

Replies: 5

Views: 3K

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

May 22, 2014 · Replies 2 · May 22, 2014

Replies: 2

Views: 1K

Undergrad Index of refraction - gas density formula

May 20, 2014 · Replies 3 · May 20, 2014

Replies: 3

Views: 4K

Graduate Can we create matter from light?

May 19, 2014 · Replies 11 · May 20, 2014

Replies: 11

Views: 3K

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

May 15, 2014 · Replies 9 · May 19, 2014

Replies: 9

Views: 2K

Graduate Exploring Reflection Shifts in Beam Splitters

May 15, 2014 · Replies 2 · May 19, 2014

Replies: 2

Views: 2K

Graduate Contributors to laser backscatter

May 18, 2014 · Replies 1 · May 18, 2014

Replies: 1

Views: 1K

Using UVC Lamps for Banknote Verification: Safety Concerns?

May 17, 2014 · Replies 5 · May 17, 2014

Replies: 5

Views: 3K

Undergrad Single slit interference picture

May 16, 2014 · Replies 7 · May 16, 2014

Replies: 7

Views: 4K

Graduate Building an Optical Transistor - Can it Work?

May 9, 2014 · Replies 2 · May 16, 2014

Replies: 2

Views: 2K

Graduate Measuring Infrared Irradiance for Solar Research

May 14, 2014 · Replies 6 · May 14, 2014

Replies: 6

Views: 2K

Undergrad Why doesn't light cancel itself?

May 12, 2014 · Replies 6 · May 14, 2014

Replies: 6

Views: 3K

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

May 11, 2014 · Replies 14 · May 13, 2014

Replies: 14

Views: 3K

Undergrad Question about Light/dark energy

May 9, 2014 · Replies 13 · May 12, 2014

Replies: 13

Views: 2K

Undergrad Why do we need to keep lights on?

Mar 5, 2014 · Replies 8 · May 11, 2014

Replies: 8

Views: 2K

Undergrad Diffraction grating interference

May 10, 2014 · Replies 3 · May 11, 2014

Replies: 3

Views: 2K

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

May 10, 2014 · Replies 2 · May 10, 2014

Replies: 2

Views: 2K

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

May 9, 2014 · Replies 3 · May 9, 2014

Replies: 3

Views: 2K

Undergrad Colours of Light: Wavelengths & Frequencies

Mar 26, 2014 · Replies 17 · May 8, 2014

Replies: 17

Views: 3K

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

May 7, 2014 · Replies 1 · May 8, 2014

Replies: 1

Views: 3K

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

May 6, 2014 · Replies 4 · May 7, 2014

Replies: 4

Views: 3K

Undergrad Laser facets reflectivity calculation from measured optical power

May 6, 2014 · Replies 1 · May 7, 2014

Replies: 1

Views: 3K

Graduate Didn't Newton's corpuscular theory fail to explain reflection?

May 5, 2014 · Replies 10 · May 6, 2014

Replies: 10

Views: 4K

Undergrad Number of reflections in an Optical fibre

May 6, 2014 · Replies 2 · May 6, 2014

Replies: 2

Views: 2K

Undergrad Is Wavelength Doubling Laser a Real Technique?

May 2, 2014 · Replies 1 · May 2, 2014

Replies: 1

Views: 3K

Undergrad Why in Optics total internal reflection happens this way?

May 1, 2014 · Replies 1 · May 2, 2014

Replies: 1

Views: 2K

Undergrad Calculate shadow path & size + object size based on distance

Apr 30, 2014 · Replies 1 · Apr 30, 2014

Replies: 1

Views: 3K

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

Apr 30, 2014 · Replies 3 · Apr 30, 2014

Replies: 3

Views: 2K

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

Apr 29, 2014 · Replies 21 · Apr 29, 2014

Replies: 21

Views: 4K

Undergrad Difference between Aspherical Lenses types/materials

Feb 21, 2014 · Replies 13 · Apr 29, 2014

Replies: 13

Views: 3K

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

Apr 27, 2014 · Replies 4 · Apr 27, 2014

Replies: 4

Views: 2K

Undergrad Counting Dark Fringes: Measurement & Order

Apr 24, 2014 · Replies 10 · Apr 27, 2014

Replies: 10

Views: 11K

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

Apr 27, 2014 · Replies 3 · Apr 27, 2014

Replies: 3

Views: 7K

Graduate Why is the the first order useful?

Apr 25, 2014 · Replies 5 · Apr 25, 2014

Replies: 5

Views: 2K

Graduate Difference between polarization and phase

Apr 22, 2014 · Replies 2 · Apr 24, 2014

Replies: 2

Views: 7K

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

Apr 23, 2014 · Replies 6 · Apr 24, 2014

Replies: 6

Views: 3K

Graduate Photon Interactions with Matter: Explained

Apr 22, 2014 · Replies 8 · Apr 23, 2014

Replies: 8

Views: 3K

Undergrad Projecting an image back into a slide projector

Apr 18, 2014 · Replies 17 · Apr 23, 2014

Replies: 17

Views: 5K

Undergrad Wave Consine Equation: Reflection & Transmission

Apr 22, 2014 · Replies 1 · Apr 22, 2014

Replies: 1

Views: 1K

Undergrad Lots of questions about optics

Apr 22, 2014 · Replies 4 · Apr 22, 2014

Replies: 4

Views: 2K

Undergrad How red glass converts incedent light to red

Apr 20, 2014 · Replies 3 · Apr 20, 2014

Replies: 3

Views: 1K

Undergrad Path differences for constructive and destructive interference

Apr 20, 2014 · Replies 1 · Apr 20, 2014

Replies: 1

Views: 2K

High School Can Atoms be Classified as Dipolar Substances?

Apr 20, 2014 · Replies 6 · Apr 20, 2014

Replies: 6

Views: 2K

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

Apr 19, 2014 · Replies 1 · Apr 20, 2014

Replies: 1

Views: 1K

High School Maximize Sunlight: 3 Object Shadow Formation

Apr 19, 2014 · Replies 11 · Apr 19, 2014

Replies: 11

Views: 3K

Graduate What is the Path of Light through Strong Gravity?

Apr 16, 2014 · Replies 35 · Apr 18, 2014

2

Replies: 35

Views: 5K

Undergrad Emergent Properties-When is the Superposition Principle Inadequate

Apr 17, 2014 · Replies 3 · Apr 18, 2014

Replies: 3

Views: 2K

Graduate Converging Lasers of Different Wavelengths

Apr 15, 2014 · Replies 4 · Apr 18, 2014

Replies: 4

Views: 2K

Undergrad Michelson interferometer fringes

Apr 16, 2014 · Replies 6 · Apr 17, 2014

Replies: 6

Views: 3K

Undergrad Three Models of Light: Definition & Use

Apr 16, 2014 · Replies 7 · Apr 17, 2014

Replies: 7

Views: 10K

High School Detecting Burned/Distorted Fibers with a Handheld Microscope

Apr 17, 2014 · Replies 10 · Apr 17, 2014

Replies: 10

Views: 3K

Undergrad Visualizing Standing Wave Created by Plucking a String

Apr 15, 2014 · Replies 12 · Apr 16, 2014

Replies: 12

Views: 9K

Undergrad Fibre optics for use in lighting?

Apr 15, 2014 · Replies 6 · Apr 16, 2014

Replies: 6

Views: 2K

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

Apr 15, 2014 · Replies 4 · Apr 16, 2014

Replies: 4

Views: 3K

Graduate High pressure tungsten incandescent light bulbs?

Apr 15, 2014 · Replies 2 · Apr 15, 2014

Replies: 2

Views: 1K

Undergrad Advice on buying a laser for 3D modeling

Apr 8, 2014 · Replies 4 · Apr 14, 2014

Replies: 4

Views: 2K

Undergrad Sound diffraction around obstacles; low and high frequencies

Apr 13, 2014 · Replies 4 · Apr 13, 2014

Replies: 4

Views: 13K

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

Apr 3, 2014 · Replies 9 · Apr 12, 2014

Replies: 9

Views: 6K

Undergrad Coherence - A Must for Interference?

Apr 9, 2014 · Replies 9 · Apr 11, 2014

Replies: 9

Views: 5K

Graduate Optical trapping of non-spherical particles

Apr 5, 2014 · Replies 2 · Apr 11, 2014

Replies: 2

Views: 2K

Graduate Transmission of light and velocity of light

Apr 10, 2014 · Replies 3 · Apr 10, 2014

Replies: 3

Views: 2K

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

Apr 9, 2014 · Replies 3 · Apr 9, 2014

Replies: 3

Views: 2K

Graduate Angular Velocity of a source of light

Apr 8, 2014 · Replies 1 · Apr 8, 2014

Replies: 1

Views: 2K

Undergrad The Effect of Gravity on Photons

Apr 6, 2014 · Replies 6 · Apr 6, 2014

Replies: 6

Views: 2K

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

Apr 5, 2014 · Replies 3 · Apr 6, 2014

Replies: 3

Views: 2K

Undergrad Do all forms of energy behave like light?

Apr 3, 2014 · Replies 12 · Apr 4, 2014

Replies: 12

Views: 3K

Graduate Four Wave mixing and split step Fourier method

Apr 3, 2014 · Replies 2 · Apr 3, 2014

Replies: 2

Views: 2K

Undergrad Conversion of Light energy to Sound energy

Apr 2, 2014 · Replies 5 · Apr 3, 2014

Replies: 5

Views: 10K

High School Inverse Square Law: Magnifying Glass & Sunlight

Mar 28, 2014 · Replies 9 · Apr 1, 2014

Replies: 9

Views: 4K

Graduate Measuring Etendue of LED sources

Mar 31, 2014 · Replies 1 · Apr 1, 2014

Replies: 1

Views: 2K

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

Mar 31, 2014 · Replies 5 · Mar 31, 2014

Replies: 5

Views: 3K

Undergrad The Doppler Effect: Why is the Second Wave of Light Different?

Mar 28, 2014 · Replies 22 · Mar 30, 2014

Replies: 22

Views: 4K

Graduate How do different materials interact with light?

Mar 28, 2014 · Replies 5 · Mar 30, 2014

Replies: 5

Views: 3K

Graduate Do Spectral Reflectance Curves Change with Different Surrounding Media?

Mar 26, 2014 · Replies 1 · Mar 28, 2014

Replies: 1

Views: 2K

Graduate Scattering force in optical trapping

Mar 26, 2014 · Replies 3 · Mar 28, 2014

Replies: 3

Views: 3K

Graduate How to write coupled mode equation of a given structure

Mar 28, 2014 · Replies 1 · Mar 28, 2014

Replies: 1

Views: 1K

Graduate Eikonal equation and trajectory of a ray of light

Mar 23, 2014 · Replies 6 · Mar 28, 2014

Replies: 6

Views: 3K

Undergrad A Snapshot in Time of a Photon

Mar 25, 2014 · Replies 13 · Mar 27, 2014

Replies: 13

Views: 2K

Graduate Pertubations To Helmholtz Equation

Mar 18, 2014 · Replies 1 · Mar 27, 2014

Replies: 1

Views: 2K

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