Optics Forum

Undergrad Maximum intensity angle for laser at normal incidence on CD tracks

Undergrad Why can wireless internet signals pass through walls when visible light cannot?

Undergrad Why do metals reflect light when electrons absorb it?

Undergrad Transparency and refractive index

Undergrad How can I calculate torque and RPM for a P-51 Mustang in a Blender3d simulation?

High School Safety with invisible IR lasers under 5mW

Graduate What Causes the Color Shifts and Spherical Aberration in Eyeglasses?

Undergrad Why does the wavefront explanation of refraction require cohesion?

Undergrad Young's two-slit experiment with laser rotation and lens effects

Graduate What happens if an object exceeds the speed of light in atmosphere or space?

Undergrad How does the refractive index change with the wavelength of light?

Graduate Comparing CALSPEC and observed LRIS spectra in the same units

Undergrad Which color radiates more heat in a spectrum

Graduate What is the formula for calculating radiant intensity from an LED onto a body?

High School Why does the silver disk under microwave pizza cook the crust but not the toppings?

Graduate Tunable Fabry-Perot interferometer

High School What are ball lenses and what are they used for?

Undergrad How Do Polygonal Mirrors Affect Scan Systems Without Lenses?

Undergrad Circular polarized glasses, how it works

High School Material for a high transmittance Prism and where to Buy

Graduate Intensity Profile of Lambert's Scatterer

High School Probability of being struck by lightning

Undergrad Is Your Model of Light an Effective Way to Visualize Electromagnetic Waves?

Graduate What are wavefronts in ray tracing and the double count problem?

High School Will these lightbulbs light up?

Undergrad Creating visible light using an antenna

Graduate Why is angle of reflection equal to angle of incidence at the photon level?

Undergrad Difference in quasi elastic scattering and non elastic scattering

High School Building Materials Refractive Index?

Graduate The Meaning of TM11 and TE10/TE01 Modes

Undergrad What is the medium that light waves move through in order to propagate?

Undergrad Does a Webcam Record Infinity When Pointed at a Computer Screen?

Undergrad Can we calculate the optical illusion?

High School Why does a submerged watch face reflect light like a mirror at certain angles?

High School Infrared laser - remote control

Graduate Does the speed of light affect the age of the universe?

Graduate Diffraction by a perfectly conducting cylinder using UTD?

Undergrad Reduce light scattering by index matching

High School The vibration direction of light wave

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Undergrad Youngs two slit experiment problems

High School Resources for a grade 11 physics project on camera optics

High School 10.1 megapixel camera, object is 18,877.90 feet away from me, can I see it?

Undergrad Why does candle flame produce thermal light instead of atomic emission?

Undergrad Aligning Optical Axis of 2 Lens Assemblies

High School Why is the sky blue and not purple?

Graduate Focal length of diverging lens to achieve 1 m spot size at 100 m

Graduate Pacemakers and lightning bolts

Undergrad A rule for lightning that’s like the inverse square

Graduate How do photons with different energies travel at the same speed?

High School Bright flashlight the emits white light

High School Does water reflect sunlight or skylight to shadow areas of floating objects?

Undergrad Diffraction of Waves through a circular aperture

Undergrad What determines the velocity of light?

High School Why doesn't oil heat in a microwave oven?

Graduate Polarizaition and susceptibility

High School Is light matter, and how can it be affected by gravity and travel through vacuum?

Undergrad X-ray Fluorescence angle question.

Undergrad Why metal sparks in a microwave oven

Undergrad Are Photons Waves or Particles in a Massless World?

High School Is Ultraviolet Light Really 'Beyond' Violet Light?

Undergrad Dispersion of light in a prism confusing

Graduate Why do the electric and magnetic fields of a photon keep synchronized?

Undergrad Why can I see point P on an inclined surface if no ray reflects to my eye?

High School What inventions (or other wise) use light refraction?

Graduate Ray transfer martix of interface

Undergrad Why does looking through a traw improve the focus or resolution you see?

Graduate Microwave reflection efficiency and atmospheric absorption

High School Can a Negative Refraction Index Enable Invisibility Cloaks?

Graduate Can electromagnetic waves be polarized in arbitrary directions?

Undergrad Age of Light: How is it Estimated?

Graduate Wave-particle duality of electromagnetic radiation and photon brightness

Undergrad Sending information on light waves

Graduate Converting rectangular waveguide fields to polar coordinates

Graduate Can a 1000 light-year pole swung like a bat exceed the speed of light at its tip?

Undergrad Comparing Rayleigh & Tomson Scattering: What's the Difference?

High School What is the temperature of air during a corona discharge?

Graduate Does Beam Interference Depend on Longitudinal Distance Post-Beamsplitter?

Undergrad What's the Difference Between AR Coatings and IR Filters?

High School Light and Time plus the distance - TIME to get from source to here

Graduate Does space resist the passage of light?

Undergrad So is there any other use to Young´s interferometer?

Graduate How Do Radiance Units and F-Number Relate in Optics?

Graduate If you have interest in quantum optics

Graduate What does saturation mean in laser physics and what is a saturating pump field?

Graduate Would isolated protons emit or absorb light?

Graduate Huygens' principle and phase shift

Graduate What happens to light when it momentarily stops during reflection?

Undergrad Light: Transverse Waves or Photons?

Undergrad The Young's double slit exp. and some general waves

Graduate Question concerning polarisation

Graduate Optical problem concerning space mirror.

Undergrad Where does light reflect from a conductor's surface?

Graduate Phase modulation with piezoelectric mirror in Michelson interferometer

Graduate [Q]Is field made by Polarization different from external field?

Undergrad Ciddor equation for refractive index of air

Undergrad Traveling at the Speed of Light