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High School Object magnified inside a cylinder of water

Feb 27, 2020 · Replies 20 · Mar 1, 2020

Replies: 20

Views: 4K

Graduate Rayleigh scattering formula on a colloidal system

Dec 29, 2019 · Replies 2 · Feb 29, 2020

Replies: 2

Views: 1K

Graduate The effect of instrumental broadening on FWHM in Raman peaks

May 17, 2018 · Replies 31 · Feb 24, 2020

2

Replies: 31

Views: 6K

Undergrad Measuring the Speed of Light: How Did We Do It?

Feb 18, 2020 · Replies 50 · Feb 24, 2020

2

Replies: 50

Views: 5K

Graduate Mode Field Diameter and Penetration depth of the Evanescent field

Feb 6, 2020 · Replies 3 · Feb 24, 2020

Replies: 3

Views: 3K

Undergrad Does the Thickness Affect a Semi-Mirror Spherical Lens' Characteristics?

Feb 19, 2020 · Replies 5 · Feb 20, 2020

Replies: 5

Views: 1K

Graduate Does the Coriolis force act on the propagation of light?

Jul 24, 2019 · Replies 7 · Feb 19, 2020

Replies: 7

Views: 10K

Graduate Methods for capturing a Fabry-Perot Interference Pattern

Feb 17, 2020 · Replies 2 · Feb 18, 2020

Replies: 2

Views: 2K

Undergrad Input/output coupling of a cavity

Feb 11, 2020 · Replies 1 · Feb 13, 2020

Replies: 1

Views: 2K

Undergrad How can a single slit diffraction create an interference pattern?

Feb 11, 2020 · Replies 17 · Feb 13, 2020

Replies: 17

Views: 2K

Graduate Sodium Vapor Lamps (low pressure) for spectral calibration and diffraction work

Feb 7, 2020 · Replies 9 · Feb 11, 2020

Replies: 9

Views: 3K

Undergrad Reflection of a wave by a rigid boundary

Feb 10, 2020 · Replies 1 · Feb 10, 2020

Replies: 1

Views: 1K

Undergrad Homopolar Motor: Energy Input, Output, & Magnetic Field

Feb 8, 2020 · Replies 5 · Feb 8, 2020

Replies: 5

Views: 2K

Undergrad Selective filter based on angle of incidence?

Feb 5, 2020 · Replies 6 · Feb 6, 2020

Replies: 6

Views: 2K

High School Sound reflection & controversy in ray diagram of concave mirror

Dec 12, 2009 · Replies 1 · Jan 27, 2020

Replies: 1

Views: 3K

Graduate Why Is My Nd:YAG Laser Beam Quality Deteriorating?

Jan 22, 2020 · Replies 6 · Jan 23, 2020

Replies: 6

Views: 2K

Undergrad Why a force perpendicular to the velocity doesn't change the magnitude?

Jan 10, 2020 · Replies 46 · Jan 20, 2020

2

Replies: 46

Views: 6K

Graduate Drop in intensity when light is focused to a point (telescope mirror)

Jan 18, 2020 · Replies 8 · Jan 19, 2020

Replies: 8

Views: 2K

Graduate Waveguide Junction TM/TE combination

Jan 17, 2020 · Replies 2 · Jan 19, 2020

Replies: 2

Views: 1K

Graduate Do Multiple Diffraction Gratings Affect Interference Patterns?

Jan 17, 2020 · Replies 2 · Jan 19, 2020

Replies: 2

Views: 2K

Undergrad Does the Ray Model of Light Apply to Radio Waves and Longer Wavelengths?

Jan 14, 2020 · Replies 12 · Jan 17, 2020

Replies: 12

Views: 2K

Graduate Gradient Force of an optical near field

Jan 9, 2020 · Replies 8 · Jan 10, 2020

Replies: 8

Views: 2K

Undergrad Holography used in telecommunications

Jan 5, 2020 · Replies 5 · Jan 9, 2020

Replies: 5

Views: 1K

Graduate Fourier transform fallacy? (Optics)

Oct 22, 2019 · Replies 29 · Jan 8, 2020

Replies: 29

Views: 4K

Graduate Dirichlet and Neumann boundary conditions in cylindrical waveguides

Dec 30, 2019 · Replies 2 · Jan 3, 2020

Replies: 2

Views: 2K

Graduate Strategy for interference problems

Jan 2, 2020 · Replies 2 · Jan 2, 2020

Replies: 2

Views: 1K

Graduate Learn the Fundamentals of the Diffraction Grating Spectrometer

Dec 4, 2019 · Replies 10 · Dec 30, 2019

Replies: 10

Views: 5K

Graduate Laser light vs "Regular" Light

Dec 21, 2019 · Replies 14 · Dec 26, 2019

Replies: 14

Views: 3K

Graduate I have a contradiction about refraction

Dec 25, 2019 · Replies 13 · Dec 26, 2019

Replies: 13

Views: 1K

Undergrad Please help me understand how transverse waves reflect at a boundary

Dec 20, 2019 · Replies 13 · Dec 25, 2019

Replies: 13

Views: 2K

Graduate How long does a diffraction pattern take to form?

Feb 19, 2011 · Replies 9 · Dec 24, 2019

Replies: 9

Views: 3K

Graduate What Causes the Angle-Insensitive Colors in Bird Feathers and Butterfly Wings?

Dec 23, 2019 · Replies 6 · Dec 24, 2019

Replies: 6

Views: 2K

Graduate Understanding the Gerchberg-Saxton Algorithm through Convex Optimization

Oct 18, 2010 · Replies 1 · Dec 23, 2019

Replies: 1

Views: 5K

Undergrad What is diffraction grating and how does it work?

Jul 24, 2014 · Replies 1 · Dec 17, 2019

Replies: 1

Views: 11K

Graduate Huygen's Principle doesn't necessarily imply the law of reflection

Dec 15, 2019 · Replies 7 · Dec 16, 2019

Replies: 7

Views: 2K

Graduate TE and TM modes in optical fibers

Dec 6, 2019 · Replies 9 · Dec 13, 2019

Replies: 9

Views: 5K

Graduate Moon Experiment: Laser Beam & Telescope for New Moon Phase

Dec 9, 2019 · Replies 17 · Dec 11, 2019

Replies: 17

Views: 4K

High School Poisson Spot Madness: Laser & Coin Lens Experiment

Dec 8, 2019 · Replies 5 · Dec 8, 2019

Replies: 5

Views: 2K

Graduate Interference Intensity: Questions & Answers

Dec 5, 2019 · Replies 7 · Dec 6, 2019

Replies: 7

Views: 2K

Undergrad Question about wave interference and coherence

Nov 28, 2019 · Replies 8 · Nov 29, 2019

Replies: 8

Views: 2K

Undergrad Understanding the Negative Sign in Laser Linewidth Calculation

Nov 25, 2019 · Replies 4 · Nov 28, 2019

Replies: 4

Views: 4K

Undergrad Refractive index using a traveling microscope

Nov 26, 2019 · Replies 3 · Nov 26, 2019

Replies: 3

Views: 4K

Graduate Diffraction pattern due to a lens with focal length f

Nov 19, 2019 · Replies 2 · Nov 20, 2019

Replies: 2

Views: 1K

Graduate Airplane flight and the rotation of the Earth

Oct 2, 2019 · Replies 25 · Nov 15, 2019

Replies: 25

Views: 5K

Graduate Elliptically polarized light & partially-polarized light

Nov 12, 2019 · Replies 11 · Nov 13, 2019

Replies: 11

Views: 3K

Graduate Does Planck's relation apply to radio waves?

Nov 12, 2019 · Replies 17 · Nov 13, 2019

Replies: 17

Views: 3K

Undergrad What Are the Factors That Affect the Cost and Quality of Varifocal Lenses?

Oct 29, 2019 · Replies 25 · Nov 12, 2019

Replies: 25

Views: 6K

Graduate Is Visible Light Bremsstrahlung Observable in Transparent Mediums?

Nov 5, 2019 · Replies 6 · Nov 12, 2019

Replies: 6

Views: 2K

Undergrad Can an object be halfway between focal point and diverging mirror?

Nov 5, 2019 · Replies 1 · Nov 5, 2019

Replies: 1

Views: 1K

Graduate Is the Fabry-Perot Interference Dependent on Pulse Duration?

Nov 4, 2019 · Replies 2 · Nov 4, 2019

Replies: 2

Views: 2K

Graduate Difference between "Inverse Scattering" and "Diffraction tomography"?

Nov 4, 2019 · Replies 1 · Nov 4, 2019

Replies: 1

Views: 1K

High School Can I read a book with an infrared led light?

Nov 3, 2019 · Replies 20 · Nov 4, 2019

Replies: 20

Views: 4K

Graduate Rayleigh limit in inverse scattering imaging

Nov 4, 2019 · Replies 1 · Nov 4, 2019

Replies: 1

Views: 1K

Undergrad Understanding Diffraction at a Single Slit: Notes and Resources

Mar 10, 2018 · Replies 9 · Nov 3, 2019

Replies: 9

Views: 3K

Undergrad Propagation of Error for Focal Length

Oct 31, 2019 · Replies 2 · Oct 31, 2019

Replies: 2

Views: 3K

Graduate Converting Velocity Formula: Polar to Cartesian

Oct 6, 2019 · Replies 6 · Oct 30, 2019

Replies: 6

Views: 8K

Undergrad Scattering of Light in Different Media

Oct 21, 2019 · Replies 15 · Oct 28, 2019

Replies: 15

Views: 3K

Graduate Understanding the Multiple scattering effect

Oct 25, 2019 · Replies 2 · Oct 25, 2019

Replies: 2

Views: 1K

Undergrad Question regarding the three polarizer paradox

Oct 17, 2019 · Replies 36 · Oct 21, 2019

2

Replies: 36

Views: 6K

Graduate Infrared energy absorption of H20 molecules as a percentage of energy

Oct 16, 2019 · Replies 2 · Oct 20, 2019

Replies: 2

Views: 2K

Graduate Describe the physics of a golf ball flight off the club face

Oct 19, 2019 · Replies 3 · Oct 20, 2019

Replies: 3

Views: 1K

Undergrad Exploring Photo-Sensor Measurements for Brightness Change Evaluation

Oct 10, 2019 · Replies 3 · Oct 13, 2019

Replies: 3

Views: 1K

Graduate Linear Polarization Interference: Can It Happen?

Oct 9, 2019 · Replies 2 · Oct 10, 2019

Replies: 2

Views: 1K

Graduate Do photons of different energies interact with each other?

Oct 6, 2019 · Replies 6 · Oct 6, 2019

Replies: 6

Views: 2K

Graduate Why does the speed of light change in different media?

Oct 5, 2019 · Replies 4 · Oct 5, 2019

Replies: 4

Views: 4K

Undergrad Thought Experiment about light speed

Oct 4, 2019 · Replies 22 · Oct 4, 2019

Replies: 22

Views: 2K

Graduate Higher Gain for PMT: Does it Really Improve SNR?

Sep 26, 2019 · Replies 11 · Sep 28, 2019

Replies: 11

Views: 3K

Undergrad How does the surface of a refracting prism become reflective?

Sep 26, 2019 · Replies 1 · Sep 27, 2019

Replies: 1

Views: 1K

High School An experiment to measure the Speed of Light

Sep 24, 2019 · Replies 14 · Sep 25, 2019

Replies: 14

Views: 2K

Undergrad Why is the speed of light smaller in a medium?

Sep 20, 2019 · Replies 23 · Sep 25, 2019

Replies: 23

Views: 3K

Undergrad What is the smallest angle of incidence necessary so that TIR occurs?

Sep 22, 2019 · Replies 25 · Sep 23, 2019

Replies: 25

Views: 3K

Undergrad How is graded index fiber made ?

Sep 22, 2019 · Replies 2 · Sep 23, 2019

Replies: 2

Views: 2K

Graduate Can a photon with energy greater than energy level difference of atom.

Sep 22, 2019 · Replies 3 · Sep 22, 2019

Replies: 3

Views: 1K

High School Why light reflected off of my calculator screen turns bluish?

Sep 20, 2019 · Replies 3 · Sep 20, 2019

Replies: 3

Views: 4K

Graduate MIT Material 10x Blacker Than Any Other: 99.995% Light Absorption

Sep 18, 2019 · Replies 8 · Sep 19, 2019

Replies: 8

Views: 3K

Graduate Running a microwave oven empty

Sep 15, 2019 · Replies 5 · Sep 17, 2019

Replies: 5

Views: 9K

High School Why objects appear smaller as the distance increases?

Sep 13, 2019 · Replies 1 · Sep 13, 2019

Replies: 1

Views: 844

High School Could I build a plasma laser from this?

Sep 7, 2019 · Replies 14 · Sep 9, 2019

Replies: 14

Views: 2K

Graduate XRF, the Auger effect, scattering and noise.

Apr 17, 2012 · Replies 1 · Sep 6, 2019

Replies: 1

Views: 3K

Undergrad Distance between light source and slits in the double slit

Sep 5, 2019 · Replies 1 · Sep 5, 2019

Replies: 1

Views: 6K

High School Which ray diagram is correct for a Compound microscope?

Oct 24, 2018 · Replies 9 · Sep 3, 2019

Replies: 9

Views: 22K

Graduate Derivation about the wave interference

Aug 30, 2019 · Replies 2 · Aug 31, 2019

Replies: 2

Views: 1K

Undergrad Light intensity profile along all radial distances

Aug 28, 2019 · Replies 4 · Aug 31, 2019

Replies: 4

Views: 2K

Graduate Shift in wavelength of photons from the Sun using energy argument

Aug 30, 2019 · Replies 3 · Aug 30, 2019

Replies: 3

Views: 2K

Undergrad Can a convex reflection be corrected using a concave mirror?

Aug 27, 2019 · Replies 1 · Aug 28, 2019

Replies: 1

Views: 1K

Graduate Do the Fresnel equations of reflection apply to monochromatic light?

Aug 27, 2019 · Replies 2 · Aug 28, 2019

Replies: 2

Views: 2K

Undergrad Location of a diffraction pattern

Aug 22, 2019 · Replies 9 · Aug 26, 2019

Replies: 9

Views: 2K

Graduate Which force is responsible for light's reflection in a surface?

Aug 26, 2019 · Replies 5 · Aug 26, 2019

Replies: 5

Views: 2K

High School What is the standard distance for viewing with a microscope?

Aug 23, 2019 · Replies 5 · Aug 26, 2019

Replies: 5

Views: 8K

Undergrad Calculate Retinal irradiance - from photometric units

Aug 21, 2019 · Replies 10 · Aug 22, 2019

Replies: 10

Views: 8K

Graduate Photon Polarization: Questions & Answers

Aug 8, 2019 · Replies 23 · Aug 22, 2019

Replies: 23

Views: 10K

Undergrad How we see image inside the concave mirror when object is beyond C?

Aug 22, 2019 · Replies 2 · Aug 22, 2019

Replies: 2

Views: 8K

Undergrad Does speed of light depend on the wavelength or frequency of it?

Aug 18, 2019 · Replies 2 · Aug 18, 2019

Replies: 2

Views: 3K

Undergrad My Leaking Skylight Peculiarity

Nov 23, 2009 · Replies 3 · Aug 17, 2019

Replies: 3

Views: 2K

Graduate Does matter exert a Force on Fields (or Light)?

Aug 12, 2019 · Replies 9 · Aug 16, 2019

Replies: 9

Views: 2K

Graduate Understanding the Mathematical Explanation for Fresnel Lenses

Aug 13, 2019 · Replies 5 · Aug 15, 2019

Replies: 5

Views: 2K

Graduate Calculating Light Intensity on a Target Using Lamp Setup

Aug 14, 2019 · Replies 7 · Aug 14, 2019

Replies: 7

Views: 2K

High School Understanding Rayleigh Scattering and Changing Sky Colors

Jul 22, 2017 · Replies 3 · Aug 13, 2019

Replies: 3

Views: 8K

High School UV detection by fluorescent goggles

Jul 15, 2019 · Replies 6 · Aug 12, 2019

Replies: 6

Views: 2K

High School Metal in Microwave: Heating Up Water and Spoons?

Feb 24, 2008 · Replies 1 · Aug 7, 2019

Replies: 1

Views: 3K

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