Menu

Navigation

More options

Style variation

Contact us

Optics Forum

Filters

Undergrad How can squinting be used by both a myopic & hyperopic eye?

May 26, 2012 · Replies 4 · May 27, 2012

Replies: 4

Views: 3K

Undergrad Crest and Trough Interference - Light Wave Explanation

May 25, 2012 · Replies 1 · May 25, 2012

Replies: 1

Views: 2K

Graduate Building infinity corrected microscope from non-infinity corrected objective

May 23, 2012 · Replies 3 · May 24, 2012

Replies: 3

Views: 5K

Graduate Is Polarity Universal? Examining Forces & Particles

May 22, 2012 · Replies 2 · May 23, 2012

Replies: 2

Views: 2K

High School Does Combining Lumens Make a Difference?

May 21, 2012 · Replies 3 · May 23, 2012

Replies: 3

Views: 15K

High School Discover the Top 10 Effects of Light: A Comprehensive Guide

May 21, 2012 · Replies 6 · May 22, 2012

Replies: 6

Views: 2K

Undergrad Speed of Lasers: 300x Faster Than Light? Plus, What Happens in Space?

May 19, 2012 · Replies 4 · May 21, 2012

Replies: 4

Views: 3K

High School Colours of objects produced by light due to reflection & absorption

May 21, 2012 · Replies 1 · May 21, 2012

Replies: 1

Views: 2K

Undergrad Calculation of light on a surface

May 18, 2012 · Replies 7 · May 21, 2012

Replies: 7

Views: 3K

Graduate The inverse square law for point light sources inside an opaque medium

May 18, 2012 · Replies 5 · May 21, 2012

Replies: 5

Views: 3K

Graduate Nonstandard Concave Mirror Optics, beyond the parabola.

May 20, 2012 · Replies 2 · May 21, 2012

Replies: 2

Views: 2K

Undergrad What is the formula for sound refraction?

Dec 6, 2010 · Replies 25 · May 21, 2012

Replies: 25

Views: 15K

Undergrad Coverage Area Of Light Reflected Using A Convex Mirror

May 20, 2012 · Replies 1 · May 21, 2012

Replies: 1

Views: 4K

Undergrad Designing Refraction Lab to Prove Critical Angle Equation

May 20, 2012 · Replies 2 · May 21, 2012

Replies: 2

Views: 3K

Undergrad Max Photon Energy: Limit & Most Observed

Apr 24, 2012 · Replies 10 · May 20, 2012

Replies: 10

Views: 4K

Graduate Light when going as fast as the speed of light

May 19, 2012 · Replies 2 · May 20, 2012

Replies: 2

Views: 2K

High School Tranform photon to other energy

May 16, 2012 · Replies 11 · May 18, 2012

Replies: 11

Views: 2K

Graduate Is it possible to make one particle have a velocity same with speed of light

May 18, 2012 · Replies 1 · May 18, 2012

Replies: 1

Views: 2K

High School Is the value of c ( speed of light ) is constant ?

May 17, 2012 · Replies 11 · May 18, 2012

Replies: 11

Views: 4K

Graduate Negative index of refraction with anisotropy, quick question

May 16, 2012 · Replies 7 · May 17, 2012

Replies: 7

Views: 3K

Graduate Spherical near to far field transformation

May 14, 2012 · Replies 1 · May 17, 2012

Replies: 1

Views: 2K

High School Can I see sea-level sunset if something lower than me is blocking my sight?

May 16, 2012 · Replies 4 · May 16, 2012

Replies: 4

Views: 2K

High School Question about solar interference on laser tag guns

May 13, 2012 · Replies 5 · May 16, 2012

Replies: 5

Views: 4K

Graduate How can molecules slow down light wave?

May 12, 2012 · Replies 7 · May 16, 2012

Replies: 7

Views: 3K

Graduate Doppler Shift and photons with a wavelength of one Plank length

May 15, 2012 · Replies 1 · May 15, 2012

Replies: 1

Views: 2K

Undergrad Can Atmospheric Composition Change Prism Effects?

May 15, 2012 · Replies 2 · May 15, 2012

Replies: 2

Views: 2K

Undergrad Conservation of momentum and laser powered solar sail

May 11, 2012 · Replies 35 · May 15, 2012

2

Replies: 35

Views: 9K

Undergrad Will a torch light recoil when light is emitted.?

May 13, 2012 · Replies 1 · May 13, 2012

Replies: 1

Views: 2K

Graduate Can Laser Intensity Stabilization Be Improved for Precise Measurements?

May 10, 2012 · Replies 4 · May 12, 2012

Replies: 4

Views: 3K

Undergrad Combining Identical LEDs: Power Increase or Not?

May 11, 2012 · Replies 5 · May 12, 2012

Replies: 5

Views: 3K

Graduate Reflection of EM plane wave from a moving object

May 9, 2012 · Replies 2 · May 11, 2012

Replies: 2

Views: 2K

Graduate Measuring intensity of superposed waves using complex amplitudes

May 9, 2012 · Replies 4 · May 11, 2012

Replies: 4

Views: 3K

Graduate Can Light be Cut?And if so then what would it take.

May 10, 2012 · Replies 6 · May 11, 2012

Replies: 6

Views: 3K

Undergrad Cathode ray create interference pattern?

May 5, 2012 · Replies 2 · May 10, 2012

Replies: 2

Views: 3K

Graduate Collecting energy from a hot diffuse source

May 10, 2012 · Replies 2 · May 10, 2012

Replies: 2

Views: 2K

Undergrad Can these two things disperse photons?What can disperse photons?

May 10, 2012 · Replies 2 · May 10, 2012

Replies: 2

Views: 2K

Undergrad Is Snell's Law valid even when incident ray is Normal to the surface?

May 10, 2012 · Replies 3 · May 10, 2012

Replies: 3

Views: 3K

High School Why do some parts of the sky appear more yellow during sunrises and sunsets?

May 9, 2012 · Replies 9 · May 10, 2012

Replies: 9

Views: 3K

High School Is it Total internal reflection, or something else?

May 8, 2012 · Replies 2 · May 9, 2012

Replies: 2

Views: 2K

High School How Are Diameter, Aperture, and Focal Length of Lenses Related?

May 9, 2012 · Replies 2 · May 9, 2012

Replies: 2

Views: 2K

High School Why does condensation on a glass window make it opaque?

May 8, 2012 · Replies 1 · May 8, 2012

Replies: 1

Views: 2K

High School Physics Theories of Stage Lighting?

May 6, 2012 · Replies 2 · May 7, 2012

Replies: 2

Views: 3K

High School How far can a 1300nm wave travel in 100ns?

May 7, 2012 · Replies 8 · May 7, 2012

Replies: 8

Views: 3K

Graduate Unraveling Temporal/Spatial Coherence of EM Radiation

Mar 23, 2008 · Replies 15 · May 7, 2012

Replies: 15

Views: 25K

The Green Lights of Guatemala seen from Space

May 5, 2012 · Replies 5 · May 6, 2012

Replies: 5

Views: 3K

Graduate Is Light Affected by Gravity or Just Following Curved Timespace?

May 4, 2012 · Replies 2 · May 4, 2012

Replies: 2

Views: 2K

Undergrad What is the relationship between physical density and optical density?

Sep 4, 2011 · Replies 16 · May 4, 2012

Replies: 16

Views: 35K

Undergrad Polarization of light and sunglasses

May 3, 2012 · Replies 2 · May 3, 2012

Replies: 2

Views: 2K

Undergrad Lightning strike->positive streamers

May 1, 2012 · Replies 3 · May 2, 2012

Replies: 3

Views: 3K

Graduate RELATIVE Space/Time and Lightspeed question

May 2, 2012 · Replies 1 · May 2, 2012

Replies: 1

Views: 2K

Graduate How Does Reflection Coefficient Change in Lossy vs Lossless Media?

May 1, 2012 · Replies 2 · May 2, 2012

Replies: 2

Views: 3K

Undergrad Why Can't There Be a Critical Angle When nB/nA Is Greater Than 1?

May 1, 2012 · Replies 1 · May 1, 2012

Replies: 1

Views: 2K

Graduate Group refraction index, group velocity

May 1, 2012 · Replies 3 · May 1, 2012

Replies: 3

Views: 3K

Graduate What is unpolarized monochromatic light?

Apr 29, 2012 · Replies 5 · May 1, 2012

Replies: 5

Views: 5K

Patternship of power plant based on lightnig

Apr 29, 2012 · Replies 7 · Apr 30, 2012

Replies: 7

Views: 2K

High School Focal Length & Concave Lens: Multiple Images?

Apr 30, 2012 · Replies 7 · Apr 30, 2012

Replies: 7

Views: 3K

Undergrad What causes light to speed up after passing through something

Apr 27, 2012 · Replies 18 · Apr 28, 2012

Replies: 18

Views: 6K

Graduate How to predict the shape of the circle from any point of view

Apr 25, 2012 · Replies 2 · Apr 28, 2012

Replies: 2

Views: 2K

Undergrad Questions on light and gravity

Apr 22, 2012 · Replies 8 · Apr 27, 2012

Replies: 8

Views: 3K

Undergrad Can refractive index of a substance be increased?

Apr 27, 2012 · Replies 1 · Apr 27, 2012

Replies: 1

Views: 2K

Undergrad Amplitude reflection coefficient for high to low refractive index

Apr 26, 2012 · Replies 1 · Apr 26, 2012

Replies: 1

Views: 8K

Graduate Evidencing interference pattern using Young's slits and sunlight - help required

Apr 26, 2012 · Replies 3 · Apr 26, 2012

Replies: 3

Views: 3K

Graduate How Is the Original Energy of CMBR Photons Affected by Universal Expansion?

Apr 23, 2012 · Replies 9 · Apr 26, 2012

Replies: 9

Views: 3K

High School Confused about thin-lens equation

Apr 25, 2012 · Replies 2 · Apr 25, 2012

Replies: 2

Views: 2K

Graduate Intensity and the Double Slit Experiment.

Apr 24, 2012 · Replies 2 · Apr 25, 2012

Replies: 2

Views: 3K

Undergrad Index of refraction related to wavelength & frequency

Apr 24, 2012 · Replies 1 · Apr 24, 2012

Replies: 1

Views: 31K

Undergrad Physics Question about Diffraction Gradings

Apr 22, 2012 · Replies 2 · Apr 22, 2012

Replies: 2

Views: 3K

Graduate Light Transport in Cold Atoms? Why is this important?

Apr 20, 2012 · Replies 4 · Apr 21, 2012

Replies: 4

Views: 2K

Undergrad Explaining Gouy Phase Shift: Simple Explanation

Apr 18, 2012 · Replies 2 · Apr 21, 2012

Replies: 2

Views: 5K

High School Projecting an Image in a Dark Room - Optics Question

Apr 20, 2012 · Replies 2 · Apr 21, 2012

Replies: 2

Views: 2K

Graduate How does an x-ray photon interact with ice?

Apr 21, 2012 · Replies 1 · Apr 21, 2012

Replies: 1

Views: 2K

High School Measuring coefficient of friction of very light item

Apr 17, 2012 · Replies 5 · Apr 20, 2012

Replies: 5

Views: 2K

Graduate Calculating Reflected Pressures in Mach Reflection Region

Apr 20, 2012 · Replies 1 · Apr 20, 2012

Replies: 1

Views: 2K

Graduate Can Mu-Metal Reflect Magnetic Fields?

Apr 12, 2012 · Replies 2 · Apr 20, 2012

Replies: 2

Views: 3K

High School What does power have to do with light bulbs?

Apr 18, 2012 · Replies 5 · Apr 19, 2012

Replies: 5

Views: 3K

Graduate Pinhole camera optimal resolution?

Apr 18, 2012 · Replies 2 · Apr 18, 2012

Replies: 2

Views: 3K

Graduate How do mechanical processes depend from the speed of light?

Apr 17, 2012 · Replies 16 · Apr 18, 2012

Replies: 16

Views: 3K

High School How will rain affect a discs flight?

Apr 17, 2012 · Replies 7 · Apr 18, 2012

Replies: 7

Views: 3K

Undergrad Laser Microphone: Understanding Physics Behind Its Working

Mar 19, 2012 · Replies 2 · Apr 18, 2012

Replies: 2

Views: 4K

Undergrad Why reflection causes polarisation of light

Apr 17, 2012 · Replies 2 · Apr 18, 2012

Replies: 2

Views: 3K

Graduate Refraction in a medium with a gradient of refractive index

Apr 6, 2012 · Replies 25 · Apr 17, 2012

Replies: 25

Views: 16K

High School Angle of reflection in a circle

Apr 16, 2012 · Replies 2 · Apr 16, 2012

Replies: 2

Views: 3K

Undergrad Light is only a photon - no wave by feynamn?

Apr 16, 2012 · Replies 4 · Apr 16, 2012

Replies: 4

Views: 2K

Graduate Determining phase of resultant from partial interference of waves

Mar 20, 2012 · Replies 14 · Apr 16, 2012

Replies: 14

Views: 8K

Graduate 3D spherical vs 2D radial waves

Apr 14, 2012 · Replies 3 · Apr 15, 2012

Replies: 3

Views: 5K

Undergrad Ellipse and Kepler's Law in Polar Coordinates

Apr 13, 2012 · Replies 3 · Apr 14, 2012

Replies: 3

Views: 4K

Undergrad Locus of light falling on a plane surface

Apr 13, 2012 · Replies 3 · Apr 14, 2012

Replies: 3

Views: 2K

Graduate What is the hottest you can make a focused beam of sunlight?

Apr 8, 2012 · Replies 42 · Apr 14, 2012

2

Replies: 42

Views: 11K

Graduate How can we determine phase information using Window Fourier Transform?

Apr 9, 2012 · Replies 8 · Apr 11, 2012

Replies: 8

Views: 4K

Undergrad Amplitude and energy relation in optics

Apr 7, 2012 · Replies 1 · Apr 11, 2012

Replies: 1

Views: 2K

High School If lightning can destroy trees, how come that people survive it?

Apr 11, 2012 · Replies 3 · Apr 11, 2012

Replies: 3

Views: 2K

Graduate The Hadron collider shooting particles at JUST under speed of light.

Apr 9, 2012 · Replies 2 · Apr 9, 2012

Replies: 2

Views: 2K

Undergrad Optics: Determining focal length for collimated beam

Apr 8, 2012 · Replies 3 · Apr 8, 2012

Replies: 3

Views: 7K

High School What's the difference between linear magnification and magnification ?

Apr 1, 2012 · Replies 4 · Apr 8, 2012

Replies: 4

Views: 10K

Graduate Understanding the Momentum of Light in Space

Apr 7, 2012 · Replies 3 · Apr 8, 2012

Replies: 3

Views: 2K

High School How does matter absorb light?

Apr 7, 2012 · Replies 4 · Apr 7, 2012

Replies: 4

Views: 7K

Undergrad Changing Laser Pulse Energy for Q-Switching Solid State Lasers

Apr 6, 2012 · Replies 3 · Apr 7, 2012

Replies: 3

Views: 3K

Graduate How Does Thin-Film Interference Create Color Effects?

Apr 5, 2012 · Replies 2 · Apr 7, 2012

Replies: 2

Views: 4K

Graduate Speed of light, permeability and permitivity of free space

Apr 7, 2012 · Replies 2 · Apr 7, 2012

Replies: 2

Views: 17K

Graduate Infinity optics - position of tube lens

Apr 3, 2012 · Replies 3 · Apr 7, 2012

Replies: 3

Views: 7K

Top