Optics Forum

Post thread

Threads

Undergrad Why don't light waves interfere when traveling in opposite directions?

  • ToddG
  • · Replies 9 ·
Replies
9

Undergrad Is rainbow a prismatic spectrum or grating spectrum ?

  • mkbh_10
  • · Replies 2 ·
Replies
2

Undergrad Can Beat Frequencies Affect Light?

  • hks85
  • · Replies 3 ·
Replies
3

High School Do all light frequencies travel together at the same speed?

  • EVT
  • · Replies 6 ·
Replies
6

Graduate Limit below which we cannot detect light?

  • neopolitan
  • · Replies 12 ·
Replies
12

Undergrad Solve Plano-Convex Lens Lensmaker's Equation

  • paulstgeorge
  • · Replies 3 ·
Replies
3

Undergrad What is coherent length and how does it affect interference?

  • mysqlpress
  • · Replies 4 ·
Replies
4

Undergrad Basics and history of laser-plasma interactions

  • Nickolas
  • · Replies 2 ·
Replies
2

Undergrad Why Do Random Flickering Laser Patterns Appear When Viewed from an Angle?

  • Yoni
  • · Replies 2 ·
Replies
2

Undergrad How do i measure light frequency?

  • trevorjdaniel
  • · Replies 14 ·
Replies
14

Graduate Duration of wave packet (photon) vs coherent time

  • coke
  • · Replies 4 ·
Replies
4

Undergrad Why can we use lasers with optical fibers but not white light?

  • chickenlittle
  • · Replies 5 ·
Replies
5

High School Can Flour Affect the Measurement of Light's Speed?

  • abhaiitg
  • · Replies 2 ·
Replies
2

High School Why do some materials reflect light more than others?

  • Physicsissuef
  • · Replies 1 ·
Replies
1

Undergrad Why are there points of zero intensity in the single slit experiment?

  • _Mayday_
  • · Replies 6 ·
Replies
6

Undergrad Scattering in water or atmosphere

  • coke
  • · Replies 1 ·
Replies
1

Graduate Coherent time vs duration time of the wave packet (photon)

  • coke
  • · Replies 1 ·
Replies
1

Graduate How do you calculate Mie scattering for salt particles of a specific size?

  • stevenbarea
  • · Replies 11 ·
Replies
11

Undergrad Superposition of position functions

  • rohanprabhu
  • · Replies 2 ·
Replies
2

High School Where does darkness go when light enters a room?

  • sutupidmath
  • · Replies 6 ·
Replies
6

High School How Do You Apply the Inverse Square Law to Light Intensity?

  • kroniic
  • · Replies 6 ·
Replies
6

Undergrad Does Playing the Violin on a Moving Train Demonstrate the Doppler Effect?

  • pardesi
  • · Replies 5 ·
Replies
5

High School How does interference and medium affect the use of drums?

  • mraads
  • · Replies 1 ·
Replies
1

Undergrad Visibility of laser light in mist of water particles

  • stevenbarea
  • · Replies 1 ·
Replies
1

High School Why do silver atoms reflect light instead of refracting it?

  • Physicsissuef
  • · Replies 8 ·
Replies
8

Undergrad The length of laser's optical cavity. Multiple of wavelength?

  • deccard
  • · Replies 4 ·
Replies
4

High School How does a rainbow look from a low-flying plane?

  • hexa
  • · Replies 7 ·
Replies
7

Graduate What is the relationship between phase and group velocities in wave propagation?

  • Yoni
  • · Replies 5 ·
Replies
5

Graduate What happens to Snell's Law when considering the atomic properties of materials?

  • eminent_youtom
  • · Replies 2 ·
Replies
2

Graduate Can orthogonally polarized light waves interfere?

  • babblingsia
  • · Replies 7 ·
Replies
7

Graduate Reverse Diffraction Research: Latest Findings

  • LazyPhysicist
  • · Replies 3 ·
Replies
3

High School How can you build a device that produces radio waves?

  • milessisk
  • · Replies 2 ·
Replies
2

High School What's the shape of a microwave beam?

  • kokophysics
  • · Replies 4 ·
Replies
4

Undergrad Why do books say unpolarized light E vector can be in any plane?

  • manjuvenamma
  • · Replies 6 ·
Replies
6

High School Scattering and wavelength dependence

  • coke
  • · Replies 2 ·
Replies
2

Undergrad What is the limit of frames per second our eyes can resolve?

  • Mindscrape
  • · Replies 6 ·
Replies
6

Undergrad Why did Herschel's infrared thermometer show higher temperature than visible red light?

  • b612_l_prince
  • · Replies 3 ·
Replies
3

Undergrad What are the heaviest and lightest particles?

  • Mk
  • · Replies 26 ·
Replies
26

Undergrad How are group velocity and refractive index related?

  • JayKo
  • · Replies 2 ·
Replies
2

Undergrad Why do rough water-covered surfaces look darker in sunlight?

  • azatkgz
  • · Replies 5 ·
Replies
5

Graduate Wave interference and energy conservation

  • Bill Minerick
  • · Replies 1 ·
Replies
1

Undergrad How does ultrasound gel reduce reflection in pregnancy scanning?

  • _Mayday_
  • · Replies 17 ·
Replies
17

High School Why does light reflect at medium boundaries if it also travels through?

  • Physicsissuef
  • · Replies 33 ·
2
Replies
33

Undergrad Is Wavelength the Only Measure of Light's Size?

  • swerdna
  • · Replies 4 ·
Replies
4

High School What is the Law of Reflection for Waves on Solid Surfaces?

  • _Mayday_
  • · Replies 6 ·
Replies
6

Undergrad Width of central maximum in a single slit diffraction pattern

  • nawab pasha
  • · Replies 1 ·
Replies
1

Graduate Can polarization affect diffraction?

  • fargoth
  • · Replies 11 ·
Replies
11

High School Why some materials have bigger refractive index than others?

  • Physicsissuef
  • · Replies 4 ·
Replies
4

Graduate How are photons re-emitted if not absorbed in a medium?

  • Physicsissuef
  • · Replies 44 ·
2
Replies
44

High School Is There an Easy Way to Learn HTML?

  • p3t3r1
  • · Replies 15 ·
Replies
15

Undergrad What Happens to Light Waves When They Move Between Different Refractive Indices?

  • cardinalboy
  • · Replies 8 ·
Replies
8

Undergrad Understanding Laser Speckle: Causes and Measurement Techniques

  • Airfoil-ed
  • · Replies 2 ·
Replies
2

High School What happens to atoms and electrons when light reflects?

  • Physicsissuef
  • · Replies 10 ·
Replies
10

High School Why do ray diagrams show light converging differently in the eye?

  • esmeralda4
  • · Replies 12 ·
Replies
12

High School The color of light can be change by the change in wavelength?

  • pawan_ctn
  • · Replies 15 ·
Replies
15

Undergrad Rotating laser beam on a circle of radius one light second

  • John Richard
  • · Replies 3 ·
Replies
3

Undergrad Fresnel diffraction; geometrical shadow

  • j-lee00
  • · Replies 2 ·
Replies
2

High School How do waves differ in front and behind a moving source?

  • sarahhhh
  • · Replies 1 ·
Replies
1

Undergrad Why measure U from the midpoint between two lenses in a lens combination

  • mkbh_10
  • · Replies 1 ·
Replies
1

High School Why Is Glass Transparent to Visible Light?

  • Physicsissuef
  • · Replies 1 ·
Replies
1

Graduate Multiple Radio Waves and Superposition

  • autek
  • · Replies 6 ·
Replies
6

Undergrad What causes wave diffraction and how does it impact wave behavior?

  • Andyblues
  • · Replies 6 ·
Replies
6

Undergrad Has the principle of light emission been discredited?

  • John Richard
  • · Replies 16 ·
Replies
16

High School Fluid appearing colorless when poured

  • Abbeyb37
  • · Replies 2 ·
Replies
2

Graduate Closed Environment Sound at Light

  • Kaleb
  • · Replies 2 ·
Replies
2

Graduate Can light travel faster than its regular speed through a fiber?

  • AspectProteus
  • · Replies 2 ·
Replies
2

High School Quick Optics Question on Gratings (Small calculation)

  • _Mayday_
  • · Replies 5 ·
Replies
5

Undergrad Destructive Interference and path difference

  • wendo
  • · Replies 2 ·
Replies
2

Undergrad What do the angles represent in terms of wavelength?

  • _Mayday_
  • · Replies 5 ·
Replies
5

Undergrad Sign Convention - Physics - Optics

  • rajiv_putcha
  • · Replies 2 ·
Replies
2

Graduate Does the photon even exist from its own perspective?

  • Meatbot
  • · Replies 10 ·
Replies
10

Undergrad Measuring wavelength with a diffraction grating from sodium lamp angles

  • _Mayday_
  • · Replies 10 ·
Replies
10

Graduate What is the Electric Field Strength of a Single Photon?

  • linerz
  • · Replies 8 ·
Replies
8

High School Advice on making laser ray box for teaching

  • Robert100
  • · Replies 1 ·
Replies
1

Graduate (optics) phase shift definition

  • DivGradCurl
  • · Replies 5 ·
Replies
5

High School How Is Telescope Magnification Calculated?

  • josue2503
  • · Replies 7 ·
Replies
7

High School Strange Refraction from Glasses

  • spizma
  • · Replies 3 ·
Replies
3

Graduate Phase change of TE and TM polarizations in reflection

  • Chen
  • · Replies 8 ·
Replies
8

Undergrad Does the Doppler Effect Double the Color Shift of a Moving Light Source?

  • 691175002
  • · Replies 3 ·
Replies
3

Undergrad Shining Light - The Physics Behind This Phenomenon?

  • Sane
  • · Replies 9 ·
Replies
9

Graduate Ray tracing through silvered lenses: two or three encounters?

  • maverick280857
  • · Replies 14 ·
Replies
14

High School Why Sun Glasses Don't Have Power

  • Himanshu
  • · Replies 15 ·
Replies
15

High School Why Does the Absorption Spectrum Have Fewer Lines Than the Emission Spectrum?

  • Redbok
  • · Replies 1 ·
Replies
1

Graduate Light speed as the processing speed of the universe

  • Meatbot
  • · Replies 6 ·
Replies
6

Undergrad Horizontal and vertical lines - star

  • Une-V
  • · Replies 8 ·
Replies
8

Graduate Would light speed be faster with no virtual particles

  • Meatbot
  • · Replies 7 ·
Replies
7

High School What Light Source Was Used in the Michelson-Morley Experiment?

  • ZLBilley
  • · Replies 5 ·
Replies
5

High School Two Rays of Light: What Color is Projected?

  • lordy12
  • · Replies 5 ·
Replies
5

Undergrad Light Isn't Constant in Certain Media?

  • Liger20
  • · Replies 2 ·
Replies
2

High School How i can find the magnification of a lens?

  • josue2503
  • · Replies 6 ·
Replies
6

High School Foreshortening - mirror vs photo/video

  • JohnJa
  • · Replies 3 ·
Replies
3

Graduate Learning About Subwavelength Gratings and Effects on Light

  • fargoth
  • · Replies 2 ·
Replies
2

Graduate Can We Observe Someone Returning at Double the Speed of Light?

  • amhere_2000
  • · Replies 11 ·
Replies
11

High School Explain to me the the physics behind this picture?

  • fishndag
  • · Replies 2 ·
Replies
2

High School Earth rotation and long flights

  • pixel01
  • · Replies 7 ·
Replies
7

Undergrad Combining laser diodes for PCB etching with silvered mirrors

  • adaminc
  • · Replies 14 ·
Replies
14

High School Why does light disappear instead of bouncing forever?

  • Keba
  • · Replies 5 ·
Replies
5

High School Young's double slit experiment resource

  • miss photon
  • · Replies 2 ·
Replies
2

Undergrad Newbie question: Why is the speed-of-light squared equal to energy/mass?

  • trewsx7
  • · Replies 5 ·
Replies
5

Graduate Convergence of light rays and Optical Path Length (OPL)

  • pardesi
  • · Replies 4 ·
Replies
4