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Undergrad How are photons different from energy?

  • glueball8
  • · Replies 15 ·
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15

Graduate Can light energy increase with amplitude without changing frequency?

  • big prairie
  • · Replies 8 ·
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8

High School Why does red light mixed with green light appear yellow?

  • snoopies622
  • · Replies 3 ·
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3

Graduate How Can I Increase the Intensity of Light from a Fiber Optic for CCD Imaging?

  • jeffmoss1
  • · Replies 8 ·
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8

Graduate Validity of a Formula for Superposition of Coherent Sound Waves

  • Nick89
  • · Replies 5 ·
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5

High School Explaining the physics behind three optical illusions

  • jj2006
  • · Replies 8 ·
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8

Graduate Modulated Light and Doppler effect

  • Deane
  • · Replies 11 ·
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11

High School Flight of projectiles from a rifle

  • leijen
  • · Replies 5 ·
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5

Graduate How to calculate solar radiation reflected by a parabolic trough to its focal point

  • Magnew
  • · Replies 3 ·
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3

Undergrad Understanding Absorption and Transmission in Spectroscopy

  • Pengwuino
  • · Replies 12 ·
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12

High School What are the amplitudes called for blue visible light, and microwaves?

  • FisherDude
  • · Replies 3 ·
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3

Undergrad Phase, Phase Difference and Phase Shift

  • unseensoul
  • · Replies 6 ·
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6

High School Why mirrors reflect all colors of light equally

  • Hinozuki
  • · Replies 8 ·
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8

Graduate Increasing the divergence of a laser.

  • will171
  • · Replies 1 ·
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1

High School Why does a laser beam on a concave mirror create a speckle pattern?

  • SF
  • · Replies 1 ·
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1

High School Why cant we obtain a virtual image on a screen?

  • Raze2dust
  • · Replies 5 ·
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5

Undergrad How to find the index of refraction of air from pressure and temperature

  • Az83
  • · Replies 7 ·
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7

Undergrad Why can’t longitudinal waves be polarized?

  • madmike159
  • · Replies 2 ·
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2

Graduate Why do photons travel at the speed of light without having mass?

  • madmike159
  • · Replies 2 ·
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2

Undergrad Casting a Large, Sharp Shadow Through Lace

  • alejandra
  • · Replies 10 ·
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10

High School Cellphone rings inside microwave oven

  • SciencePF
  • · Replies 2 ·
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2

Undergrad Energy conservation in wave interference

  • O.J.
  • · Replies 7 ·
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7

Graduate Interaction of modulated lasers

  • waht
  • · Replies 1 ·
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1

Graduate Extracting information from Michelson interferogram phase correction

  • kipi
  • · Replies 1 ·
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1

Graduate Atmospheric Scattering Problem

  • jcdenton89
  • · Replies 1 ·
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1

Undergrad Solving Thin Film Problem: Wavelength in Visible Spectrum

  • wsuask
  • · Replies 2 ·
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2

Undergrad How does the sign of dS affect induced EMF polarity in Faraday's law?

  • nyxynyx
  • · Replies 6 ·
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6

High School Optical pyrometers - advantages and disadvantages?

  • stevenbarea
  • · Replies 2 ·
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2

High School How Do Light Rays and Mirror Equations Affect Image Formation?

  • banana44
  • · Replies 3 ·
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3

Undergrad Does light speed apply to all waves traveling in vacuum?

  • Crazy Tosser
  • · Replies 13 ·
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13

Undergrad Snell's Law: Origins and Applications

  • Ernestazik
  • · Replies 1 ·
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1

Graduate What lens shape gives perfect focus?

  • Adeimantus
  • · Replies 9 ·
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9

Undergrad Can Light Move Faster Than the Speed of Light on a Huge Circular Screen?

  • jablonsky27
  • · Replies 10 ·
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10

High School What Would a Universe Without Light Look Like?

  • mvx
  • · Replies 17 ·
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17

What does a light bulb in vacuum look like?

  • Crazy Tosser
  • · Replies 11 ·
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11

High School Stage lantern with 12m throw and 5m height: which lens and mirror?

  • pmmiller14
  • · Replies 1 ·
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1

High School Convex Lens and Light Refraction

  • pmmiller14
  • · Replies 4 ·
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4

Graduate Can Light's Acceleration Be Changed?

  • Fullperson
  • · Replies 11 ·
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11

Undergrad What causes a boomerang to flatten out in flight

  • sarm2005
  • · Replies 1 ·
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1

Undergrad Is it possible to build a toy boat powered by high-power LEDs?

  • TimSmall
  • · Replies 2 ·
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2

Graduate Why does a (laser) light beam not disperse?

  • Gerenuk
  • · Replies 6 ·
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6

Graduate Using a triplet lens from a CRT projector with a larger LCD panel

  • rotor_hed80
  • · Replies 6 ·
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6

Undergrad Light transmission through glass.

  • WoodenFrogs
  • · Replies 5 ·
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5

Undergrad Path difference and phase difference.

  • Fuego
  • · Replies 3 ·
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3

High School How far the light can be shine?

  • zyx_oay
  • · Replies 13 ·
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13

Graduate Phase shift upon reflection from Macleod's thin film theory

  • DivGradCurl
  • · Replies 1 ·
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1

Graduate Collimating beam with optical axis

  • garydia1
  • · Replies 2 ·
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2

High School Good resource for understanding light waves?

  • meni
  • · Replies 8 ·
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8

Graduate Does the Photon Mass of the Universe Add Up?

  • Dav333
  • · Replies 6 ·
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6

Graduate Can photons decay and create a second cosmic event horizon?

  • dst
  • · Replies 5 ·
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5

Undergrad What is the speed of light measured relative to?

  • _Mayday_
  • · Replies 14 ·
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14

Dandelion turned white in elevator light

  • Tachyonie
  • · Replies 3 ·
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3

High School Why farther objects appears smaller?

  • ahmedhassan72
  • · Replies 28 ·
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28

Undergrad Superposition, interference and mathematical description

  • Air
  • · Replies 5 ·
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5

Undergrad Photon momentum and lasers transfering energy

  • WraithM
  • · Replies 19 ·
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19

Undergrad If something moved at the speed of light

  • Gamerex
  • · Replies 4 ·
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4

Graduate An assumption about the speed of light I .

  • ahmedhassan72
  • · Replies 8 ·
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8

Undergrad Can I Determine Unknown Sample Concentration Using Absorption Spectroscopy?

  • sukanyasv
  • · Replies 1 ·
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1

Graduate Using Quarter Wave Plate in Microscopy: Hanan's Question

  • hen
  • · Replies 5 ·
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5

Undergrad Why does total internal reflection only occur from denser to rarer media?

  • skywalker09
  • · Replies 4 ·
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4

Graduate Can something exceed the speed of light?

  • ahmedhassan72
  • · Replies 4 ·
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4

Undergrad Derivation of reflection diffraction grating formula

  • JamesGman
  • · Replies 1 ·
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1

Graduate Ball lightning that melted 7cm hole in window glass in 1976

  • Minich
  • · Replies 1 ·
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1

Graduate Fabry-Perot Cavity: Energy and Round Trip Phase Dynamics

  • cepheid
  • · Replies 1 ·
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1

Undergrad CO2 laser and sigarette smoke question

  • Minich
  • · Replies 5 ·
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5

Undergrad Does Opaque Material Block Laser Radiation?

  • hithere
  • · Replies 6 ·
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6

Graduate How Does Temperature Gradient Affect Refractive Index in Fluid Thermodynamics?

  • Relena
  • · Replies 7 ·
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7

Graduate Non-Collimated Beam Effects on Gratings

  • Neo20
  • · Replies 1 ·
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1

High School Why does a rainbow form an arc shape?

  • anonymoussome
  • · Replies 2 ·
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2

Undergrad Formula for Paper Airplane Flight?

  • neogeek
  • · Replies 4 ·
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4

Undergrad Can you shorten the wavelength of light from a mercury vapor bulb?

  • silverado408
  • · Replies 13 ·
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13

High School Determining Focal Length of Convex Lens Without Apparatus

  • xploitpatcher
  • · Replies 1 ·
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1

Graduate Calculating cladding thickness to prevent light leakage from a waveguide

  • Lee
  • · Replies 15 ·
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15

High School Why does light intensity decrease when light passes through a glass block?

  • Zebadee
  • · Replies 7 ·
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7

Graduate Vector of magnitude m making angles alpha, beta and gamma with i,j,k

  • manjuvenamma
  • · Replies 13 ·
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13

Undergrad So I was thinking about Light, right ?

  • RagingPineapple
  • · Replies 8 ·
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8

Undergrad Do atoms in materials emit waves in all directions during diffraction and refraction?

  • Physicsissuef
  • · Replies 9 ·
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9

Undergrad How does a mirror reflect light at the atomic level?

  • Tachyonie
  • · Replies 3 ·
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3

Undergrad How Is the Formula for Radiation Pressure on a Reflecting Surface Derived?

  • premed
  • · Replies 1 ·
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1

Graduate Laser through optic fiber - out before through

  • condonethis
  • · Replies 7 ·
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7

Graduate Why are radio waves and light both called electromagnetic radiation?

  • joey_m
  • · Replies 18 ·
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18

Undergrad Does light have the ability to choose its path using Fermat's principle?

  • spidey
  • · Replies 2 ·
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2

High School Where Can I Find a Large Concave Mirror for Heating Water?

  • supersteve921
  • · Replies 1 ·
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1

Undergrad Intensities and magnitudes in natural science

  • DaveC426913
  • · Replies 1 ·
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1

High School What happens when two light beams intersect at perpendicular angles?

  • phanidee
  • · Replies 15 ·
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15

Graduate Snell's law with a complex refractive index

  • zhanghe
  • · Replies 5 ·
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5

Undergrad Why is radius of curvature equal to 2f for a lens or mirror?

  • mkbh_10
  • · Replies 6 ·
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6

Undergrad Solving the Flight of a Pencil Problem

  • Lookaash
  • · Replies 15 ·
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15

High School What Would You See in a Mirrored Sphere?

  • Hard Proof
  • · Replies 17 ·
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17

Graduate Gravity field phenomenon is the curved light ray ?

  • einsteinooo
  • · Replies 4 ·
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4

Graduate Red laser speckle, diffraction edge, and self-interference patterns with mirrors

  • dst
  • · Replies 5 ·
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5

Undergrad Add Light? Possible with Lasers?

  • makorihi
  • · Replies 12 ·
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12

Graduate What describes the Airy equation in light diffraction theory?

  • a-lbi
  • · Replies 4 ·
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4

High School What are uses for lens focal points?

  • mkbh_10
  • · Replies 6 ·
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6

Graduate Does stellar aberration show in a ground-based laser experiment?

  • einsteinooo
  • · Replies 4 ·
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4

Graduate Photon Absorption: Does Energy Matter?

  • americanforest
  • · Replies 2 ·
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2

Graduate Why does reflected light have a phase change of pi at the atomic level?

  • mkbh_10
  • · Replies 3 ·
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3

Undergrad Why doesn't light go faster than it does?

  • Meatbot
  • · Replies 5 ·
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5

Undergrad Is there such a thing as in-phase and coherent white light?

  • Green Xenon [Radium]
  • · Replies 5 ·
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5

Undergrad Projecting Video Onto Two-Way Mirror

  • white_russian
  • · Replies 1 ·
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1