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High School Speed of light squared got to do with the production of energy

  • bozo the clown
  • · Replies 9 ·
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9

High School How the white ray of light changes to a spectrum of colours

  • gunblaze
  • · Replies 3 ·
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3

Undergrad Why does light slow down in a medium and can it be stopped?

  • lvlastermind
  • · Replies 14 ·
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14

Graduate Can a rotating tower reach the speed of light at its tip?

  • mlip
  • · Replies 7 ·
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7

Graduate Can Photons Physically Travel Backwards in Time?

  • Olias
  • · Replies 9 ·
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9

Graduate Photon does not experience time

  • lvlastermind
  • · Replies 6 ·
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6

High School Refraction Index: Does Temperature Change It?

  • darkar
  • · Replies 4 ·
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4

Graduate Why Can't Photons Orbit Around Massive Objects?

  • Scott Sieger
  • · Replies 21 ·
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21

Graduate 4 newb qstns:ageless light,physical change,time,twins

  • mercmisfire
  • · Replies 9 ·
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9

Graduate Can one-way mirrors concentrate sunlight or laser beams indefinitely?

  • syk
  • · Replies 1 ·
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1

High School How do lasers create 3D images in mid-air?

  • alpha_wolf
  • · Replies 12 ·
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12

Graduate What thickness of gold coating gives 50% transmittance and 50% reflectance?

  • Maurader
  • · Replies 1 ·
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1

Graduate What happens to a photon after it is detected?

  • relativelyslow
  • · Replies 20 ·
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20

High School How much does the photon weighs?

  • tumor
  • · Replies 20 ·
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20

High School Can holographic displays be created without glass or solids?

  • aeronox
  • · Replies 1 ·
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1

Undergrad What determines which light frequencies are reflected vs absorbed?

  • Matrixman13
  • · Replies 1 ·
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1

Undergrad Increasing Laser Power - Can Mirrors Create Infinite Power?

  • relativelyslow
  • · Replies 17 ·
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17

Graduate Photons are made from gravitons

  • kurious
  • · Replies 13 ·
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13

Undergrad How can I limit the divergence of my laser using a telescope?

  • Treatz
  • · Replies 3 ·
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3

High School Why does a microwave heat ice and frozen food?

  • Moe
  • · Replies 21 ·
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21

High School Can a sphere has a critial angle

  • no idea
  • · Replies 3 ·
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3

High School What is BEAM WAIST in lasers and where it is located?

  • vani
  • · Replies 1 ·
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1

Undergrad Ridiculous to think that light is the only static

  • BohrringPlank
  • · Replies 10 ·
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10

High School Why is red on top in rainbows if refraction puts it at the bottom?

  • no idea
  • · Replies 1 ·
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1

High School Can You See Light in a Vacuum with a Flashlight?

  • timetraveldude
  • · Replies 18 ·
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18

Undergrad Why speed of light is constant?

  • Ductaper
  • · Replies 45 ·
2
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45

Graduate Why won't the bright spot in my Michelson Interferometer turn dark?

  • Maurader
  • · Replies 3 ·
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3

Undergrad Will a Lens's Focal Point Change in Water?

  • no idea
  • · Replies 1 ·
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1

Graduate Do Photons Have a Nucleus or Electrons?

  • Imparcticle
  • · Replies 5 ·
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5

Undergrad Can air, glass, and water slow down the speed of light?

  • billy_boy_999
  • · Replies 7 ·
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7

Undergrad How does light travel in a vacuum?

  • Eric_atl
  • · Replies 4 ·
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4

Undergrad Global Dimming, Less Light Reaching Us

  • Atrayo
  • · Replies 1 ·
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1

High School Why does a black object reflect some light if it absorbs all colors?

  • no idea
  • · Replies 4 ·
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4

Graduate Searching for a graduate program in optics

  • brchuz
  • · Replies 1 ·
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1

Graduate Can particles smaller than photons travel faster for FTL communication?

  • bozo the clown
  • · Replies 10 ·
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10

High School Between two mirrors. Real experiment.

  • Michael F. Dmitriyev
  • · Replies 43 ·
2
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43

High School How are X-rays produced?

  • expscv
  • · Replies 7 ·
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7

High School Laser or the torchlight does not bend 90 degrees?

  • touqra
  • · Replies 13 ·
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13

Undergrad Is light speed constant relative to a stationary reference frame?

  • ram2048
  • · Replies 29 ·
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29

Undergrad Light and Redshift in material?

  • Link
  • · Replies 1 ·
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1

High School Microwaves don t pass thru the door of the microwave oven

  • tumor
  • · Replies 1 ·
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1

High School Understanding Color Perception: Why Do We See Different Colors?

  • repugno
  • · Replies 5 ·
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5

Graduate What is meant by SINGLE PULSE in the output of Q-sWITCHED laser

  • vani
  • · Replies 1 ·
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1

Graduate Photon self-interference interpreted as inside-out dynamic

  • Loren Booda
  • · Replies 1 ·
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1

Undergrad I find a way to go faster than light

  • Bringo
  • · Replies 1 ·
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1

Why do laser weapons in sci-fi have color and how could they be controlled?

  • AnthreX
  • · Replies 6 ·
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6

Graduate Faster than light-yes -but how?

  • kurious
  • · Replies 5 ·
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5

Undergrad Why doesn't c² = a² - b² match the focal point being half the radius of curvature?

  • nautica
  • · Replies 3 ·
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3

Graduate Faster than light by a long way

  • kurious
  • · Replies 1 ·
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1

Undergrad Light Intensity at Point Sources: Impact on Energy Falloff?

  • djmike
  • · Replies 1 ·
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1

Undergrad Why does light scatter off walls instead of reflecting like a mirror?

  • Alkatran
  • · Replies 6 ·
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6

Graduate What Are Alternative Photon Models and Their Implications?

  • wespe
  • · Replies 3 ·
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3

Graduate Dark energy redshifts cmbr photons

  • kurious
  • · Replies 3 ·
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3

High School Whatever happened to the Particle Theory of Light?

  • Mark
  • · Replies 3 ·
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3

Graduate Expansion Greater than Light Speed?

  • Antonio Lao
  • · Replies 34 ·
2
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34

Undergrad What RPM Gains Can Be Expected from a Lighter Axle on a Go Kart?

  • steven mosher
  • · Replies 6 ·
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6

Undergrad How Can Photons of the Same Size and Speed Carry Different Energy Levels?

  • mee
  • · Replies 2 ·
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2

Graduate What is Frictional Amplitude in Laser Cutting?

  • infraray
  • · Replies 1 ·
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1

Graduate Maxwell's Equation: Proving the Speed of Light

  • Ebolamonk3y
  • · Replies 5 ·
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5

Undergrad Why is the speed of light constant regardless of perspective?

  • Matt Jacques
  • · Replies 8 ·
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8

Graduate Polarizations for a photon in vacuuo

  • Loren Booda
  • · Replies 1 ·
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1

High School Convex mirror, and you point a light at it horizontally

  • Alkatran
  • · Replies 2 ·
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2

Undergrad In-Phase and Out-Phase Wave Interference: What Happens?

  • Antonio Lao
  • · Replies 5 ·
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5

High School How can we find the focus in a lens

  • no idea
  • · Replies 1 ·
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1

Undergrad What is the relative velocity of flight?

  • Faizan
  • · Replies 2 ·
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2

Graduate Is the Speed of Light Constant in All Reference Frames?

  • NanakiXIII
  • · Replies 46 ·
2
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46

Graduate Does Light have a Ground State ?

  • Les Sleeth
  • · Replies 1 ·
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1

Undergrad Laser, color and speed of light

  • Mr.Ed
  • · Replies 15 ·
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15

Undergrad Why does a thin water film on cold windows become opaque?

  • zhana
  • · Replies 5 ·
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5

Graduate Guiding Wave Through Diffraction in Photonic Crystal Fiber

  • androz
  • · Replies 2 ·
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2

Graduate Can Spaceships Reach Light Speed Due to Permeability and Permittivity?

  • mee
  • · Replies 7 ·
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7

Undergrad Does light have mass, inertia, and acceleration?

  • Noah
  • · Replies 5 ·
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5

Graduate Is the speed of light really an absolute limit?

  • pallidin
  • · Replies 6 ·
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6

High School Why do clock hands appear counterclockwise in a mirror?

  • tennistud
  • · Replies 1 ·
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1

Undergrad How do anti-reflection coatings increase light transmission?

  • ovinomancer
  • · Replies 3 ·
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3

Graduate Nature of Light Speed's Maximum

  • mee
  • · Replies 17 ·
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17

Undergrad Why is the speed of light used in the equation E=mc^2?

  • KingNothing
  • · Replies 7 ·
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7

High School Does Gravity Cause Refraction Similar to Light?

  • mee
  • · Replies 3 ·
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3

High School Interference, Diffraction, Diffraction Grading

  • Kirstin
  • · Replies 1 ·
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1

Graduate Speed of light is measured by all observers

  • protonman
  • · Replies 66 ·
3
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66

Undergrad Why we use composed lentiform in optical science?

  • pedram
  • · Replies 1 ·
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1

Graduate Why should light be the foundational constant in physics?

  • JesseBonin
  • · Replies 26 ·
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26

Undergrad Why is skylight polarized and how does reflection cause polarization?

  • Moose352
  • · Replies 1 ·
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1

Experience Realistic Lens Simulation with Our Convex Lens Program

  • gfak25
  • · Replies 3 ·
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3

High School Speed of Light vs. Sound: What Would Change?

  • expscv
  • · Replies 3 ·
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3

Graduate Why Does a Diffraction Grating Not Show Intermediate Intensity Patterns?

  • Blistering Peanut
  • · Replies 1 ·
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1

High School Light Refraction and Wavelength / Frequency

  • Chen
  • · Replies 2 ·
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2

Graduate What are the implications of an undetectable particle in the field of science?

  • fbsthreads
  • · Replies 5 ·
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5

Undergrad Speed of light equal for all observers

  • cider_drinker
  • · Replies 4 ·
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4

Undergrad Can the Brain Differentiate Individual Sound Waves in Superposition?

  • broegger
  • · Replies 6 ·
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6

Graduate Speed of light relative to the universe is zero

  • whitelighter
  • · Replies 13 ·
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13

Graduate Light speed relative to universal speed

  • whitelighter
  • · Replies 9 ·
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9

High School What Did Gustaf Dalén Invent to Win the Nobel Prize for Physics?

  • Lorentz
  • · Replies 2 ·
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2

High School Angle of reflection for light from clock position 10 to 5

  • math4me
  • · Replies 9 ·
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9

Graduate Can we redirect light with a field and teleport photons without a receiver apparatus?

  • SAZAR
  • · Replies 22 ·
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22

Graduate Faster than Light: 2D Photon Field?

  • ranyart
  • · Replies 2 ·
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2

Graduate Is it possible that light doesn't 'propagate' in a vacuum?

  • Raavin
  • · Replies 13 ·
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13

High School Is it possible to travel 1000 light years in an instant at the speed of light?

  • Gara
  • · Replies 1 ·
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1

High School Luminous vs. Nonluminous Light Sources

  • ermines
  • · Replies 6 ·
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6

High School How do I calculate focal length from L and U measurements?

  • math4me
  • · Replies 1 ·
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1