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Graduate When Feynman describes scatterers

  • WiFO215
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4

Graduate Light speed Impossible Faster than lightProbable?

  • Frosty_TAW
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5

Undergrad Projector with the greatest projection angle

  • SAZAR
  • · Replies 4 ·
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4

Graduate Modeling the flight of a frisbee

  • Kricket
  • · Replies 4 ·
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4

Undergrad Measuring the intensity of light

  • N0b0dy
  • · Replies 4 ·
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4

Undergrad Why can't light go thru solids?

  • quantumh2o
  • · Replies 5 ·
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5

Undergrad Why does only one quarter of Earth's surface reflect sunlight, not half?

  • dsfranca
  • · Replies 6 ·
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6

Undergrad How Does a Narrow Slit Affect Laser Beam Divergence?

  • 0207
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1

Undergrad Questions about lasers and diffraction

  • stringbean
  • · Replies 2 ·
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2

Graduate Light absorption in solar cell.

  • nafisahmed29
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High School Light rays in concave lens,moon and eclipses?

  • sameeralord
  • · Replies 7 ·
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7

Undergrad Why do surfaces get darker when they are wet?

  • itchyfrog
  • · Replies 5 ·
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5

High School Why is total internal reflection called total if not everything reflects?

  • sameeralord
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1

Undergrad Do Red Lasers of 314mW Pose a Safety Risk?

  • davidco2
  • · Replies 5 ·
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5

Undergrad Why do antenna and waveguide sizes depend on wavelength, not amplitude?

  • chonjourney
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3

Why does a reflected object show different colors in adjacent glass panes?

  • thepopasmurf
  • · Replies 4 ·
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4

Undergrad Can you relate sound frequency's to light frequency's?

  • Cyrus80772
  • · Replies 6 ·
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6

Graduate Could someone explain to me Fermat's theorem?

  • WiFO215
  • · Replies 26 ·
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26

Graduate Light, and from whence it cometh.

  • Peter Watkins
  • · Replies 8 ·
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8

High School Does Refraction through a Glass Slab Cause Different Levels of Image Distortion?

  • thinker93
  • · Replies 7 ·
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7

Graduate Light changes frequency depending on

  • Learnphysics
  • · Replies 4 ·
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4

Undergrad Black vs white vs red with relation to UV rays

  • anon123456789
  • · Replies 3 ·
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3

Undergrad Does a magnet attract iron more strongly than another magnet's opposite pole?

  • RestlessMind
  • · Replies 12 ·
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12

Undergrad Confusion with faster than light

  • Yelyah
  • · Replies 28 ·
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28

High School Thin, light, cheap and strong as wood material?

  • downhilller
  • · Replies 8 ·
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8

Graduate Non Quantized Light: Could It Produce Energy Below Photon?

  • Relena
  • · Replies 4 ·
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4

Graduate Efficient Laser Beam Expansion Techniques for Optimal Illumination

  • splitringtail
  • · Replies 8 ·
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8

Undergrad Is the intersection of two reflected rays from plane mirrors a real image?

  • aalver
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2

High School Why placing a blue filter in front of a light source will give blue li

  • hangover
  • · Replies 1 ·
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1

High School If light is absorbed and re-emitted by glass, am I seeing the sun or new light?

  • whydoyouwanttoknow
  • · Replies 42 ·
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High School Fading Ink on Book Covers: Sunlight Cause?

  • Gringo123
  • · Replies 2 ·
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2

Undergrad Can we predict the color that will be perceived by the eye?

  • penguin007
  • · Replies 18 ·
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18

Graduate Why does only the parallel component absorb at Brewster's angle?

  • arish
  • · Replies 11 ·
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11

High School Can a 10 Watt Globe be Powered by 24V?

  • dvn
  • · Replies 9 ·
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9

Undergrad Hyugens principle and laser wave dispersion

  • Ulysees
  • · Replies 27 ·
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27

Graduate How much mass does it take before photons will have a stable orbit?

  • smorningstar
  • · Replies 5 ·
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5

Undergrad Lens to collimate light from 18" parabolic mirror setup

  • iansmith6
  • · Replies 2 ·
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2

High School Why does hot fire glow blue if the sun and planets emit the same spectrum?

  • menniandscience
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1

Undergrad Why does the setting Sun appear to accelerate if Earth rotates at constant angular speed?

  • hotcommodity
  • · Replies 5 ·
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5

High School Lightwave Oven: Why We Heat Food With Microwave

  • menniandscience
  • · Replies 4 ·
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4

Undergrad Light/radio waves radiate in all direction

  • rajeshmarndi
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5

Undergrad Concentration of photons in a beam of light

  • taylaron
  • · Replies 11 ·
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11

High School Why do matte surfaces reflect less light than glossy ones?

  • Aeoghur
  • · Replies 4 ·
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4

Undergrad How to understand the image of lens at infinity

  • navigator
  • · Replies 8 ·
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8

Graduate Creating a Computer Flight Model: Best Starting Place for Aerodynamic Theory

  • metiscus
  • · Replies 6 ·
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6

High School Principle of lightining conductor

  • logearav
  • · Replies 1 ·
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1

High School Why does mass not affect gas pressure in ideal gas law?

  • ariana0923
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3

Undergrad Why does clapping produce sound waves instead of light waves?

  • Blade_Runner
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3

Graduate What is the cause of my peculiar vision abnormality?

  • mXSCNT
  • · Replies 8 ·
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8

Undergrad Why does the wave of color that has a greater index of refraction bend more?

  • 101nancyma
  • · Replies 3 ·
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Undergrad Calculating uncertainty in 1/X and plotting thin lens data

  • RedGuy1606
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5

High School What Do Telescope Specifications Like 6x16 and 175/1000m Mean?

  • Peter2288
  • · Replies 2 ·
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2

Graduate Near-to-far field tranformation

  • krindik
  • · Replies 6 ·
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6

High School Lightning Rod attached to railing of my balcony

  • BetonKalle
  • · Replies 8 ·
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8

Undergrad Why does wavelength affect an object's interaction with waves?

  • PntLnSqrCb
  • · Replies 5 ·
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5

Undergrad Do Passive Night Vision Scopes Exist Without Electronic Amplification?

  • fleem
  • · Replies 3 ·
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3

Undergrad Why use the Ramsden configuration for plano-convex lenses in the eyepiece

  • llabesab16
  • · Replies 2 ·
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2

High School Can you control light beam length and see light in daylight without a haze machine?

  • julez520
  • · Replies 3 ·
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3

High School Strong laser pointers - facts?

  • Artlav
  • · Replies 12 ·
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12

Graduate Atmospheric Opacity and laser Attenuation query

  • Jleidenfrost
  • · Replies 6 ·
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6

Undergrad How much energy can a black metal surface absorb from direct sunlight?

  • FieldOpsGirl
  • · Replies 9 ·
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9

Undergrad Does Coherent Light Waves Frequency Matter?

  • west
  • · Replies 2 ·
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2

Graduate Gravity Accelerating Objects To The Speed Of Light

  • ScienceNerd36
  • · Replies 12 ·
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12

High School Can the Michelson-Morley Experiment Prove That Space is a Vacuum?

  • cragar
  • · Replies 3 ·
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3

Undergrad Light is known to have a wave-particle duality

  • ashutosha
  • · Replies 9 ·
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9

Undergrad What is coherent light and why doesn't incoherent light interfere?

  • GrizzlyBat
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3

Graduate Why is the Rayleigh Criterion not a definitive resolution limit for microscopes?

  • KFC
  • · Replies 5 ·
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5

Undergrad The propagation of light through a vacuum.

  • thomasxc
  • · Replies 9 ·
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9

Undergrad Purpose of Entrance Slit in Spectrometer: Rgds Evidenso

  • evidenso
  • · Replies 3 ·
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3

Graduate Why use the top and center of the slit for dark fringe derivation

  • KFC
  • · Replies 2 ·
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2

Undergrad Blue Pool - colour change phenomenon

  • billiards
  • · Replies 25 ·
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25

Undergrad How do photons behave when entering a prism?

  • menniandscience
  • · Replies 2 ·
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2

High School Laser in Outer Space: Will It Go On Forever?

  • wavingerwin
  • · Replies 3 ·
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3

Undergrad What is the feasibility of using laser pointers to paint the moon?

  • DavidSnider
  • · Replies 3 ·
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3

Graduate Observations takne at the speed of light

  • BuddyPal
  • · Replies 8 ·
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8

High School Can a Laser Light Be Magnified with a Magnifying Glass?

  • ehummel
  • · Replies 14 ·
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14

Undergrad Why does a light bulb's second reflection shift relative to tiles?

  • YellowPeril
  • · Replies 1 ·
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1

Undergrad Is There a Real Difference Between Diffraction and Interference in Physics?

  • KFC
  • · Replies 2 ·
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2

Graduate Poincare sphere and Degree of polarization

  • Madara
  • · Replies 2 ·
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2

Undergrad Hanging a mirror with two off-center nails

  • dennish00a
  • · Replies 22 ·
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22

Undergrad Traveling .999999 reapeating the speed of light .

  • cragar
  • · Replies 15 ·
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15

High School Understanding Light Polarization: Clearing Up Confusion for Better Comprehension

  • abid220
  • · Replies 5 ·
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5

Graduate How Can You Align a Thin Electrode Parallel to a Surface Without Direct Contact?

  • splitringtail
  • · Replies 1 ·
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1

Graduate Optical Question: HeNe Beam Through Potassium Permanganate

  • Altruist
  • · Replies 2 ·
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2

Undergrad Humans Traveling at Light Speed: A Possibility?

  • bondinthesand
  • · Replies 2 ·
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2

Graduate Does a photon experience time or space?

  • dshea
  • · Replies 27 ·
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27

Undergrad Why Does Wavelength Impact Passage Through a Hole?

  • tobjackson
  • · Replies 5 ·
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5

Graduate Polishing a BK7 Prism to 4020 Scratch Rating

  • Desh627
  • · Replies 1 ·
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1

Undergrad How does single slit diffraction create two wave sources at the slit edges?

  • wavingerwin
  • · Replies 4 ·
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4

Graduate Is the group velocity necessarily slower than light (STL)?

  • lalbatros
  • · Replies 6 ·
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6

Undergrad Can I Use a 2/3" CCTV Lens on a 1/3" Camera?

  • 0207
  • · Replies 3 ·
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3

Undergrad Does Light Amplitude Depend on Frequency?

  • Joans
  • · Replies 1 ·
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1

Undergrad Normalizing then scaling a vector to a new magnitude

  • wraithseeker
  • · Replies 2 ·
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2

High School Does shiny aluminum foil reflect infrared photons?

  • cragar
  • · Replies 3 ·
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3

Optical phenomena with colliding river rocks

  • flatmaster
  • · Replies 3 ·
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3

Graduate Introduction to Optics: Books for Grad Students

  • Alice Jin
  • · Replies 2 ·
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2

High School Does Color Depend on Wavelength or Frequency?

  • pratzzz
  • · Replies 21 ·
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21

Graduate Attractive and repulsive light force

  • junglebeast
  • · Replies 3 ·
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3

Undergrad Why does time appear to stop when traveling at the speed of light?

  • Petenerd
  • · Replies 2 ·
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2

Graduate Diffraction of incoherent beam

  • sperelat
  • · Replies 6 ·
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6