Optics Forum

Post thread

Threads

Undergrad Colour planes still existing after filtering

  • vipis
  • · Replies 3 ·
Replies
3

Graduate Light bouncing in a square prism at 45° angles

  • user3
  • · Replies 4 ·
Replies
4

Graduate Stimulated Brillouin scattering inside an optical fiber

  • eahaidar
  • · Replies 9 ·
Replies
9

Graduate Can a force be applied to a photon in the direction of its travel?

  • andrewkinnear
  • · Replies 13 ·
Replies
13

Undergrad Why does Fizeau's method need a toothed wheel to measure light speed?

  • haha1234
  • · Replies 9 ·
Replies
9

High School How do light rays form real and virtual images in mirrors?

  • WannabeFeynman
  • · Replies 1 ·
Replies
1

Undergrad Understanding Interference of Sound Experiment

  • Jimmy87
  • · Replies 4 ·
Replies
4

High School Young's Double Slit Experiment lab

  • braeden
  • · Replies 4 ·
Replies
4

Graduate Questions about light(wave and dual nature)

  • eightsquare
  • · Replies 2 ·
Replies
2

Undergrad Physical significance of TE and TM waves

  • Aniket1
  • · Replies 1 ·
Replies
1

Undergrad Diffraction through circular apertures

  • u0362565
  • · Replies 10 ·
Replies
10

Undergrad Optical design for a tent camera obscura

  • bam707
  • · Replies 1 ·
Replies
1

Graduate What is the maximum refractive index for lens numerical aperture?

  • u0362565
  • · Replies 3 ·
Replies
3

Graduate Which scatters light more: a sphere or a hemisphere?

  • zheng89120
  • · Replies 5 ·
Replies
5

Graduate Dispersion and refractive indices

  • user3
  • · Replies 3 ·
Replies
3

High School Light diffraction experiment ideas for 20-hour school investigation

  • NeoXx
  • · Replies 19 ·
Replies
19

Graduate How does laser cavity length affect beam directivity?

  • sophiecentaur
  • · Replies 12 ·
Replies
12

Undergrad Voltage needed to melt a 120V 60W incandescent filament

  • elegysix
  • · Replies 8 ·
Replies
8

Strange occurrence on office wall.

  • Jilang
  • · Replies 14 ·
Replies
14

Undergrad Why does sound intensity become 4I with two identical sources?

  • jaumzaum
  • · Replies 3 ·
Replies
3

Graduate Doppler shift of reflected sound between two moving observers in a medium

  • Zag
  • · Replies 25 ·
Replies
25

Graduate Why does metal reflection stop above the plasma frequency?

  • damosuz
  • · Replies 28 ·
Replies
28

Undergrad How Do Soap Bubbles Display Vivid Colors Through Light Interference?

  • smart_worker
  • · Replies 2 ·
Replies
2

Graduate Fiberooptic Laser Doppler Velocimeter

  • Zokisa
  • · Replies 1 ·
Replies
1

Graduate SNR in dBV vs dBm - Insight Needed

  • stevenjones3.1
  • · Replies 2 ·
Replies
2

Undergrad Do photons get absorbed in mirrors and transparent materials?

  • null void
  • · Replies 7 ·
Replies
7

High School Fresnel lens project with my dad

  • MACHO-WIMP
  • · Replies 8 ·
Replies
8

Graduate Why does a mass on a torsional pendulum move toward a hidden light source?

  • louisrancourt
  • · Replies 11 ·
Replies
11

High School Why is magnitude g instead of vector g used in range projectile

  • negation
  • · Replies 7 ·
Replies
7

Undergrad Can a Polarizer Change the Polarization State of a Laser Beam?

  • james walshe
  • · Replies 1 ·
Replies
1

Graduate Energy conservation in identical destructive interference.

  • siddharth5129
  • · Replies 8 ·
Replies
8

Graduate Using glass spheres to filter off-angle photons in a 2-micron tube

  • jamesadrian
  • · Replies 17 ·
Replies
17

Graduate Confusion about the nature of Diffraction.

  • siddharth5129
  • · Replies 2 ·
Replies
2

Graduate Information about Beam Displacers

  • Gwinterz
  • · Replies 2 ·
Replies
2

Graduate Vectorial kinematic in cartesian and polar system/notanion

  • Jhenrique
  • · Replies 10 ·
Replies
10

Undergrad Why can't I collimate sunlight with two lenses?

  • Bastian74
  • · Replies 10 ·
Replies
10

Graduate Why does polished silicon reflectance peak near 500 nm?

  • hjelmgart
  • · Replies 2 ·
Replies
2

Undergrad Nodes and antinodes in stationary waves

  • arvindsharma
  • · Replies 1 ·
Replies
1

Undergrad How can photons have frequency and energy in special relativity?

  • radioactive8
  • · Replies 8 ·
Replies
8

Undergrad Why light is not considered as a longitudinal wave?

  • Trojan666ru
  • · Replies 10 ·
Replies
10

Graduate What Would Happen if High Light Density Hit Water?

  • 1832vin
  • · Replies 4 ·
Replies
4

Graduate How to be sure that a He-Ne laser light is monochromatic

  • bznm
  • · Replies 4 ·
Replies
4

Undergrad Why do speakers emit buzzing noises when receiving a text?

  • BOAS
  • · Replies 3 ·
Replies
3

Undergrad Coinciding of 2F and C in ray diagram of lenses

  • Ahsan Khan
  • · Replies 12 ·
Replies
12

Graduate Attract Lightning: Can You Use an Electro-Magnet?

  • xthomasbhx
  • · Replies 3 ·
Replies
3

High School Measuring the speed of light with chocolate and a microwave oven

  • Naty1
  • · Replies 8 ·
Replies
8

Graduate Optics question: converging lens with virtual object

  • quickk
  • · Replies 1 ·
Replies
1

Undergrad What happens when monochromatic light is incident on a reflective grating?

  • einstein1921
  • · Replies 3 ·
Replies
3

High School Why does light bend when it slows down in a denser medium?

  • Sakha
  • · Replies 31 ·
2
Replies
31

Undergrad Why does a change in impedance cause reflection?

  • lavster
  • · Replies 2 ·
Replies
2

Graduate Resolution limit of delay line interferometer

  • stevenjones3.1
  • · Replies 5 ·
Replies
5

Graduate Nonlinear Optics Books: Recommendations for Robert Boyd Style

  • fred3142
  • · Replies 1 ·
Replies
1

Graduate What prism material best separates UV from solar radiation?

  • trojsi
  • · Replies 9 ·
Replies
9

High School Why does an object appear darker when wet?.

  • Kuiper83
  • · Replies 5 ·
Replies
5

Undergrad Regarding modeling of light bulb circuit

  • elegysix
  • · Replies 5 ·
Replies
5

High School Magnification effect looking through small holes in a display stand

  • Buckleymanor
  • · Replies 18 ·
Replies
18

Undergrad Clarifying the Relationship between Convex Mirrors and Image Distance

  • fredrogers3
  • · Replies 1 ·
Replies
1

High School Neon Lamp Polarity Measurement

  • DaTario
  • · Replies 4 ·
Replies
4

Undergrad Reflection coefficient of thin aluminium coating on glass

  • Orthoceras
  • · Replies 18 ·
Replies
18

Graduate Optical path length change due to absorption

  • stevenjones3.1
  • · Replies 6 ·
Replies
6

Graduate The quality factor of cavity resonator

  • Paul Black
  • · Replies 15 ·
Replies
15

Undergrad Refractive index- will it travel back along the same way?

  • Outrageous
  • · Replies 9 ·
Replies
9

Undergrad Microwaves and Interference problem

  • srh38
  • · Replies 5 ·
Replies
5

Undergrad Why Do Wet Clothes Appear Darker?

  • Kimia
  • · Replies 4 ·
Replies
4

Graduate Why do circular fringes reverse in the Michelson interferometer?

  • Acid92
  • · Replies 1 ·
Replies
1

Graduate Understanding Refractive Phase Differences in Electromagnetic Waves

  • ajdecker1022
  • · Replies 5 ·
Replies
5

High School Light From Flashlight: Does It Reach Space?

  • botev1912
  • · Replies 2 ·
Replies
2

Undergrad Doppler effect and Speed of light

  • rushikesh
  • · Replies 5 ·
Replies
5

Graduate Optical Fiber Attenuation for 1550nm FBG Sensor

  • sree745
  • · Replies 2 ·
Replies
2

Graduate Velocity of red light vs. blue light in water - qualitative reasoning?

  • vvarma
  • · Replies 7 ·
Replies
7

High School Can light move matter?

  • tdev
  • · Replies 5 ·
Replies
5

Graduate Confirming the pulse-bandwidth-product for fs laser pulses

  • mamoamamoa
  • · Replies 1 ·
Replies
1

Undergrad How Can I Improve My Laser Detection Software for Camera-Equipped Computers?

  • X_Art_X
  • · Replies 6 ·
Replies
6

Undergrad Light takes the path of most time elapsed?

  • AntiElephant
  • · Replies 8 ·
Replies
8

Undergrad How can diffraction occur with gap smaller than the wavelength?

  • coconut62
  • · Replies 1 ·
Replies
1

Undergrad Compton scattering is inelastic?

  • bobie
  • · Replies 8 ·
Replies
8

Graduate Does photon wavelength describe an actual wave or just energy?

  • jaydnul
  • · Replies 9 ·
Replies
9

Undergrad Teaching about light before quantum mechanics

  • Avichal
  • · Replies 10 ·
Replies
10

Undergrad Does refractive index of water depend on wavelength?

  • adjacent
  • · Replies 18 ·
Replies
18

Undergrad How Many Images Does a Zone Plate Produce with an Object in Front?

  • roshan2004
  • · Replies 1 ·
Replies
1

Graduate How does the speed of light determine the size of material bodies?

  • Aidyan
  • · Replies 4 ·
Replies
4

Undergrad Raman Amplification: Understanding its Role in Optical Fibers

  • eahaidar
  • · Replies 2 ·
Replies
2

High School Difference between temporal and spatial coherence

  • ppy
  • · Replies 3 ·
Replies
3

High School Coherent waves for interference

  • ppy
  • · Replies 3 ·
Replies
3

Undergrad Relationship between the refractive index and absorption

  • asdfghhjkl
  • · Replies 6 ·
Replies
6

Undergrad Why does slit diffraction occur?

  • CrimpJiggler
  • · Replies 5 ·
Replies
5

Graduate Irradiance measurement procedure

  • elegysix
  • · Replies 1 ·
Replies
1

Graduate The construction of half silvered mirrors

  • warfreak131
  • · Replies 1 ·
Replies
1

Undergrad What is a quick way to approximate flight time off a cliff?

  • grayb
  • · Replies 2 ·
Replies
2

Graduate Acoustical diffusion, scattering, attenuation

  • Misophonia
  • · Replies 5 ·
Replies
5

Graduate Interference for for N slits formula

  • Nikitin
  • · Replies 2 ·
Replies
2

Graduate Complex refraction angle in total internal reflection

  • ShayanJ
  • · Replies 3 ·
Replies
3

Graduate Does a 100% reflective box with a light source inside gain mass or explode?

  • adjacent
  • · Replies 13 ·
Replies
13

High School Why does light on a surface look dimmer when intense light is cast on it?

  • adjacent
  • · Replies 3 ·
Replies
3

High School When does refraction take place?

  • MHD93
  • · Replies 2 ·
Replies
2

Graduate Laser Gain Medium Interactions

  • stevenjones3.1
  • · Replies 17 ·
Replies
17

Undergrad How Does CCD Offset Affect Laser Beam Exit Angle?

  • _Matt87_
  • · Replies 4 ·
Replies
4

Undergrad Can Two Laser Beams Interfere with Each Other?

  • DParlevliet
  • · Replies 2 ·
Replies
2

High School Can UV Light Speed Up Fading of Car Paint?

  • icor1031
  • · Replies 1 ·
Replies
1

Graduate Why does E-field magnitude vary across a parallel plate waveguide?

  • fred3142
  • · Replies 3 ·
Replies
3