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What color is best for the eye's resolving power?

Apr 14, 2007 · Replies 13 · Apr 16, 2007

Replies: 13

Views: 3K

Undergrad Calculating Refractive Index of Liquid Mixtures: Is There a General Formula?

Apr 13, 2007 · Replies 3 · Apr 14, 2007

Replies: 3

Views: 21K

Undergrad Why do DVDs scatter blue light and CDs scatter white light?

Apr 12, 2007 · Replies 4 · Apr 12, 2007

Replies: 4

Views: 3K

Graduate Moving faster than the speed of light

Apr 7, 2007 · Replies 12 · Apr 10, 2007

Replies: 12

Views: 5K

Undergrad Polished surface of metal as a mirror

Apr 9, 2007 · Replies 3 · Apr 10, 2007

Replies: 3

Views: 7K

High School Speed of Light: Get Answers to Your Questions

Apr 10, 2007 · Replies 4 · Apr 10, 2007

Replies: 4

Views: 2K

High School Can Non-Microwave Safe Plates Cause Explosions in a Microwave Oven?

Apr 9, 2007 · Replies 4 · Apr 10, 2007

Replies: 4

Views: 3K

Undergrad Unraveling the Mystery of Wave Collisions: Same Amplitude Interaction

Apr 9, 2007 · Replies 1 · Apr 9, 2007

Replies: 1

Views: 2K

Graduate Photon Width: What Have I Missed?

Oct 13, 2006 · Replies 46 · Apr 7, 2007

2

Replies: 46

Views: 14K

Graduate Invisibility Cloak Update: Bending Light & Metamaterials

May 25, 2006 · Replies 6 · Apr 4, 2007

Replies: 6

Views: 3K

Graduate Michelson Interferometer and white light fringes

Jan 30, 2005 · Replies 8 · Apr 3, 2007

Replies: 8

Views: 13K

High School Settle my dispute- Can you see more of yourself in a mirror?

Mar 25, 2007 · Replies 18 · Apr 1, 2007

Replies: 18

Views: 15K

Graduate Quantifying Photons: How Many in a Given Space?

Mar 28, 2007 · Replies 4 · Mar 29, 2007

Replies: 4

Views: 2K

Graduate Conceptual problem on Polarization

Mar 25, 2007 · Replies 4 · Mar 26, 2007

Replies: 4

Views: 4K

Undergrad Chromatic Aberration: Lens & Mirror Effects

Mar 26, 2007 · Replies 1 · Mar 26, 2007

Replies: 1

Views: 3K

Undergrad How Can an Object Emit Light/Radiation Without Energy Source?

Mar 20, 2007 · Replies 5 · Mar 20, 2007

Replies: 5

Views: 2K

Graduate How does a converging lens create the Fourier transform of an aperture?

Mar 9, 2007 · Replies 1 · Mar 16, 2007

Replies: 1

Views: 6K

Undergrad Reflection of a mechanical wave

Mar 13, 2007 · Replies 2 · Mar 13, 2007

Replies: 2

Views: 3K

Graduate Will the Room Stay Illuminated in Einstein's Photon Box?

Feb 25, 2007 · Replies 23 · Mar 9, 2007

Replies: 23

Views: 5K

High School What happens when you shine a light on a black surface?

Mar 7, 2007 · Replies 11 · Mar 7, 2007

Replies: 11

Views: 18K

High School Solve the Mystery: What Does a Red Light Look Like?

Mar 5, 2007 · Replies 5 · Mar 5, 2007

Replies: 5

Views: 2K

Graduate Faster than the speed of light

Mar 3, 2007 · Replies 1 · Mar 3, 2007

Replies: 1

Views: 3K

Graduate Does Integration Imply Superposition in Field Calculations but Not in Energy?

Mar 1, 2007 · Replies 1 · Mar 1, 2007

Replies: 1

Views: 3K

High School Light double slit interference - at home

Feb 28, 2007 · Replies 2 · Mar 1, 2007

Replies: 2

Views: 6K

Undergrad Sky colour explanation by scattering

Feb 24, 2007 · Replies 9 · Feb 26, 2007

Replies: 9

Views: 4K

High School Ive got a question about light.

Feb 25, 2007 · Replies 4 · Feb 25, 2007

Replies: 4

Views: 2K

High School Why is the intensity of polarised light equal to half of the incident light?

Feb 24, 2007 · Replies 4 · Feb 25, 2007

Replies: 4

Views: 3K

Graduate Direction of Light - Laser Beam Moving Sideways at Relative Speed

Feb 24, 2007 · Replies 0 · Feb 24, 2007

Replies: 0

Views: 2K

High School Incident light angle brightness

Feb 22, 2007 · Replies 4 · Feb 24, 2007

Replies: 4

Views: 4K

Undergrad Question about the dispersion of white light in a prism.

Feb 11, 2007 · Replies 15 · Feb 19, 2007

Replies: 15

Views: 5K

Undergrad Will intensity of this light become infinity?

Feb 19, 2007 · Replies 4 · Feb 19, 2007

Replies: 4

Views: 2K

Undergrad Question on the original Michelson-Morley Experiment

Feb 18, 2007 · Replies 4 · Feb 19, 2007

Replies: 4

Views: 3K

High School Why does a fluorescent light burn out?

Feb 16, 2007 · Replies 2 · Feb 16, 2007

Replies: 2

Views: 7K

Undergrad Regarding the 1light year pole question

Feb 14, 2007 · Replies 9 · Feb 15, 2007

Replies: 9

Views: 4K

High School How long would it take to move a pole one light year long one foot?

Feb 13, 2007 · Replies 4 · Feb 13, 2007

Replies: 4

Views: 6K

Undergrad Question about light waves and phases.

Feb 12, 2007 · Replies 6 · Feb 13, 2007

Replies: 6

Views: 4K

Undergrad Superposition Of Transverse Waves.

Feb 12, 2007 · Replies 2 · Feb 12, 2007

Replies: 2

Views: 5K

Graduate What Causes the Diffraction Pattern When Looking at a Lamp Through a Slit?

Feb 9, 2007 · Replies 3 · Feb 10, 2007

Replies: 3

Views: 5K

High School What happens when you point a laser-pointer into the sky?

Feb 6, 2007 · Replies 7 · Feb 7, 2007

Replies: 7

Views: 14K

Undergrad How does one measure the index of refraction of a liquid, and .?

Feb 6, 2007 · Replies 1 · Feb 6, 2007

Replies: 1

Views: 4K

Undergrad Wave Theory of Light: Energy Independent of Frequency?

Jan 27, 2007 · Replies 32 · Feb 1, 2007

2

Replies: 32

Views: 8K

Undergrad Comparing Energy Emissions: Microwave Ovens vs. Cell Phones

Jan 28, 2007 · Replies 3 · Jan 28, 2007

Replies: 3

Views: 14K

Undergrad How does a microwave oven generate and contain radiation for cooking?

Jan 28, 2007 · Replies 2 · Jan 28, 2007

Replies: 2

Views: 3K

High School Reflection of light upon ourselves

Jan 26, 2007 · Replies 4 · Jan 28, 2007

Replies: 4

Views: 3K

Graduate Photons and physical interpretation of Fourier transform

Jan 23, 2007 · Replies 2 · Jan 24, 2007

Replies: 2

Views: 3K

Undergrad In optics experiments we assume that the sun rays are parallel

Jan 20, 2007 · Replies 6 · Jan 23, 2007

Replies: 6

Views: 4K

Undergrad Young's Double Slits: Coherent Light Explained

Jan 20, 2007 · Replies 3 · Jan 22, 2007

Replies: 3

Views: 3K

Graduate Cross section for scattering of gauge bosons and Majorana neutrinos

Jan 4, 2007 · Replies 2 · Jan 22, 2007

Replies: 2

Views: 3K

Graduate Laser Interference: Why No Alternating Bright and Dark Light?

Jan 20, 2007 · Replies 2 · Jan 21, 2007

Replies: 2

Views: 2K

Undergrad Microwaved Food Safety: Is Stove Cooking Safer?

Jan 18, 2007 · Replies 6 · Jan 21, 2007

Replies: 6

Views: 4K

High School Is 2.5 GHz the optimal frequency for microwaves to cook food?

Dec 17, 2006 · Replies 13 · Jan 18, 2007

Replies: 13

Views: 19K

High School Materials for Dispersing Laser Beams

Jan 17, 2007 · Replies 5 · Jan 18, 2007

Replies: 5

Views: 7K

High School Understanding Light Refraction: Why a Ping Pong Ball Looks Bigger in Water

Jan 15, 2007 · Replies 14 · Jan 17, 2007

Replies: 14

Views: 4K

Graduate Appearence with negative index of refraction

Dec 4, 2006 · Replies 12 · Jan 15, 2007

Replies: 12

Views: 4K

Graduate Are wavelengths well defined or vague?

Jan 11, 2007 · Replies 2 · Jan 11, 2007

Replies: 2

Views: 2K

Graduate Window screen focuses bricks beyond?

Jan 8, 2007 · Replies 4 · Jan 9, 2007

Replies: 4

Views: 3K

Graduate Is there a relationship between the energy and mass of photons?

Jan 6, 2007 · Replies 10 · Jan 7, 2007

Replies: 10

Views: 3K

Poll

Undergrad Is Black a Colour? Examining the Definition and Perception of Black as a Colour

Sep 19, 2006 · Replies 116 · Jan 6, 2007

4

Replies: 116

Views: 84K

High School The Possibility of Making Objects Invisible Using Sound and Light

Dec 31, 2006 · Replies 8 · Dec 31, 2006

Replies: 8

Views: 4K

High School Comparing Camera & Human Eyes: Zoom & Focus

Dec 26, 2006 · Replies 20 · Dec 29, 2006

Replies: 20

Views: 5K

High School Understanding Wave Interference: Explaining the Effects of Wave Interaction

Dec 21, 2006 · Replies 4 · Dec 27, 2006

Replies: 4

Views: 3K

Undergrad Doppler Effect of Light Waves at Half Speed?

Oct 12, 2006 · Replies 13 · Dec 27, 2006

Replies: 13

Views: 3K

Undergrad Why Does Camera Zoom In When Lens Expands?

Dec 24, 2006 · Replies 17 · Dec 27, 2006

Replies: 17

Views: 6K

High School How does wavelength affect diffraction?

Dec 21, 2006 · Replies 6 · Dec 24, 2006

Replies: 6

Views: 13K

Undergrad Understanding Angular Magnification for Objects at Different Distances

Dec 23, 2006 · Replies 4 · Dec 24, 2006

Replies: 4

Views: 4K

Undergrad What Do You See When Replacing a Screen with Your Eyes for a Real Image?

Dec 12, 2006 · Replies 37 · Dec 24, 2006

2

Replies: 37

Views: 9K

High School Power Plant Types: Learn About Microwave Power Plants

Dec 23, 2006 · Replies 4 · Dec 23, 2006

Replies: 4

Views: 5K

Graduate Why Does Light Travel at Different Speeds in Various Media?

Dec 19, 2006 · Replies 9 · Dec 23, 2006

Replies: 9

Views: 3K

High School Is Ball Lightning Just a Slow-Burning Gas Phenomenon?

Dec 6, 2006 · Replies 9 · Dec 12, 2006

Replies: 9

Views: 3K

Undergrad Light Reflection in Right-Angle Prisms

Dec 9, 2006 · Replies 3 · Dec 10, 2006

Replies: 3

Views: 5K

Graduate Ray Optics: Angular Magnification

Dec 8, 2006 · Replies 2 · Dec 8, 2006

Replies: 2

Views: 8K

Graduate Capturing Light with a Theoretical Mirror Sphere: Observable? Possible?

Dec 8, 2006 · Replies 3 · Dec 8, 2006

Replies: 3

Views: 2K

Undergrad Lightning bolt power and Back to the Future

May 31, 2006 · Replies 19 · Dec 8, 2006

Replies: 19

Views: 25K

High School Why flash of light in a digital camera?

Dec 7, 2006 · Replies 16 · Dec 8, 2006

Replies: 16

Views: 6K

Undergrad Understanding the Concept of Time Travel for Photons

Oct 24, 2006 · Replies 13 · Dec 8, 2006

Replies: 13

Views: 5K

Undergrad Single Slit Diffraction and Huygen's Principle

Dec 4, 2006 · Replies 1 · Dec 4, 2006

Replies: 1

Views: 7K

Undergrad Can a Laser Affect Water? Solutions Needed

Dec 1, 2006 · Replies 8 · Dec 4, 2006

Replies: 8

Views: 5K

High School Where is the principle focus of a plain mirror?

Oct 27, 2006 · Replies 5 · Dec 1, 2006

Replies: 5

Views: 14K

High School Is Light Composed of Electrons or Protons?

Nov 25, 2006 · Replies 19 · Nov 29, 2006

Replies: 19

Views: 24K

Graduate Understand Linear Superposition:Maxwell, Quantum Mechanics & Beyond

Nov 27, 2006 · Replies 2 · Nov 27, 2006

Replies: 2

Views: 6K

High School About how to prevent being struck by lightning

Aug 11, 2004 · Replies 45 · Nov 26, 2006

2

Replies: 45

Views: 23K

Undergrad Refraction of light through ice crystals

Nov 18, 2006 · Replies 3 · Nov 20, 2006

Replies: 3

Views: 2K

Undergrad Single Slit diffraction question

Nov 1, 2006 · Replies 7 · Nov 19, 2006

Replies: 7

Views: 5K

Undergrad Photons are produced at random?

Nov 16, 2006 · Replies 3 · Nov 18, 2006

Replies: 3

Views: 2K

Undergrad How Do Sundogs Form?

Nov 18, 2006 · Replies 2 · Nov 18, 2006

Replies: 2

Views: 1K

Undergrad Can anyone tell me where to buy an off-axis collimating lens?

Nov 15, 2006 · Replies 2 · Nov 16, 2006

Replies: 2

Views: 2K

Undergrad How does Gravity travel the speed of light

Nov 5, 2006 · Replies 22 · Nov 15, 2006

Replies: 22

Views: 4K

High School Could be a daft question but needs asking

Nov 13, 2006 · Replies 6 · Nov 14, 2006

Replies: 6

Views: 2K

High School What main wavelengths are within sunlight (p.s. not a hw problem)

Nov 7, 2006 · Replies 7 · Nov 13, 2006

Replies: 7

Views: 4K

Graduate What is the best material for my desired reflectivity?

Nov 11, 2006 · Replies 1 · Nov 12, 2006

Replies: 1

Views: 3K

High School Physical explanation for camera DOF (depth of field)

Nov 11, 2006 · Replies 3 · Nov 11, 2006

Replies: 3

Views: 6K

High School B&W Glass Filter: Does it Exist?

Nov 7, 2006 · Replies 24 · Nov 10, 2006

Replies: 24

Views: 3K

Graduate Negative Diffraction: Poynting's Vector & Maxwell's Equations

Nov 4, 2006 · Replies 2 · Nov 10, 2006

Replies: 2

Views: 2K

Graduate Optics: polarisation alignment

Nov 6, 2006 · Replies 2 · Nov 8, 2006

Replies: 2

Views: 2K

Undergrad See Infrared with a TV Remote | Try it Yourself!

Nov 2, 2006 · Replies 18 · Nov 6, 2006

Replies: 18

Views: 22K

Graduate Maximising X-Ray Image Quality with Minimal Dose Administration

Nov 1, 2006 · Replies 2 · Nov 1, 2006

Replies: 2

Views: 3K

High School Yes! Monochromatic Blue Light Can Reflect Red Light

Oct 13, 2006 · Replies 17 · Oct 31, 2006

Replies: 17

Views: 4K

High School Concave mirror and virtual image

Oct 30, 2006 · Replies 1 · Oct 30, 2006

Replies: 1

Views: 8K

High School Spherical aberration and concave mirrors

Oct 28, 2006 · Replies 4 · Oct 30, 2006

Replies: 4

Views: 7K

Graduate Does Compton Scattering Affect the Phase Velocity of Light?

Oct 14, 2006 · Replies 1 · Oct 25, 2006

Replies: 1

Views: 3K

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