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A heavier person vs. a lighter person diving into a pool
Jan 5, 2021
Replies
6
Views
2K
Can heavy objects be used to modulate light waves with small amplitude?
Dec 27, 2020
Replies
4
Views
940
What causes this curious light phenomenon? (video inside)
Dec 25, 2020
Replies
11
Views
2K
Coupling of resonant modes in a 1D Photonic Crystal
Dec 23, 2020
Replies
1
Views
1K
Why does the polarity of a bass guitar recording vary?
Dec 18, 2020
Replies
10
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1K
Particle analysis of diffraction
Dec 16, 2020
Replies
1
Views
637
How does a wave with circular polarization behave?
Dec 15, 2020
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9
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1K
Interference in thin films; confusion regarding geometry
Dec 14, 2020
Replies
4
Views
871
Suspended particles and the index of refraction
Dec 11, 2020
Replies
8
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1K
How does the speed of light change when it enters glass?
Dec 9, 2020
Replies
12
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2K
Can Light Travel Faster Than the Speed of Light in Glass?
Dec 9, 2020
Replies
18
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2K
Is Light a Wave or a Particle?
Dec 7, 2020
Replies
17
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23K
Circuits and the Speed of Light (2)
Dec 4, 2020
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2
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1K
Circuits and the Speed of Light
Dec 4, 2020
Replies
2
Views
801
How Does VIS-NIR Reflectance Linearity Vary in Mixed Color Pigments?
Dec 1, 2020
Replies
4
Views
961
A living thing made of different photonic molecules?
Dec 1, 2020
Replies
2
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1K
Correction of horizontal astigmatism in an anamorphic lens
Nov 28, 2020
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1
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1K
Deriving the Law of Reflection from Huygens Principle
Nov 28, 2020
Replies
5
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2K
What is it that makes light rebound off a surface?
Nov 27, 2020
Replies
1
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2K
Where do photons come from? Exploring the origin of photon emission in a vacuum
Nov 25, 2020
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17
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1K
Can we see real, inverted and magnified images without a screen?
Nov 24, 2020
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4
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2K
Exploring Compton Scattering and Backscatter Scanners
Nov 18, 2020
Replies
1
Views
954
Diffraction of light and conservation of energy.
Nov 15, 2020
Replies
3
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1K
Negative Concave Lens - Creating a Beam Expander
Nov 14, 2020
Replies
7
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3K
Lens selection for close proximity surface photos
Nov 12, 2020
Replies
11
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1K
Adding Zooming Capability to my Far Infrared Spectrum Sensor
Nov 6, 2020
Replies
12
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2K
How to calculate shadows in nanophotonics
Nov 5, 2020
Replies
17
Views
1K
Polarisation through a chiral nematic crystal
Nov 2, 2020
Replies
9
Views
1K
Does a material change the direction of polarization of light?
Nov 1, 2020
Replies
7
Views
2K
Question about two-stage light gas guns
Oct 30, 2020
Replies
1
Views
915
Acoustic reflections from an elliptical wall in Urbino city (Italy)
Oct 29, 2020
Replies
2
Views
949
Reflection of inverted waves to form a standing wave
Oct 22, 2020
Replies
3
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1K
Differences between X-rays and Gamma rays
Oct 16, 2020
Replies
3
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1K
Can you calculate optical density from permittivity and permeability?
Oct 10, 2020
Replies
19
Views
2K
Why does a divergent lens create an interference pattern?
Oct 7, 2020
Replies
3
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1K
Apparatus for a polarization filter rotator dial
Oct 2, 2020
Replies
6
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1K
Can Two Laser Beams with Different Phases Interfere?
Sep 19, 2020
Replies
10
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2K
Why can't light pass through to the dark side of a window?
Sep 13, 2020
Replies
6
Views
1K
Kramers-Kronig relation for refractive index
Sep 10, 2020
Replies
1
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3K
Image in a glass sphere (Ray Optics)
Sep 4, 2020
Replies
4
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2K
Radar Reflection: Charged vs Non-Charged Objects
Sep 3, 2020
Replies
8
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1K
Brain function & bipolar: fluid volume & speed of information in tubes
Aug 30, 2020
Replies
1
Views
673
Can we connect two laser sources to make a stronger beam with a larger radius?
Aug 28, 2020
Replies
11
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1K
Do two light waves with difference frequencies connect when they meet?
Aug 26, 2020
Replies
5
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2K
Measuring Reflectance with a Digital Camera
Aug 22, 2020
Replies
9
Views
2K
Light interacting with Matter -- Does the wavelength make a difference?
Aug 21, 2020
Replies
13
Views
2K
Please Explain My Polarized Light Experiments
Aug 16, 2020
Replies
12
Views
2K
Light speed and refractive index
Aug 11, 2020
Replies
25
Views
3K
Controlling output light power by constructive/destructive interference
Aug 4, 2020
Replies
5
Views
1K
What is the logic behind the mirror symmetry method of solving circuits?
Aug 4, 2020
Replies
18
Views
10K
How will light react in this situation....
Aug 2, 2020
Replies
7
Views
1K
Why do shadows change shape when light is shone on them?
Jul 29, 2020
Replies
5
Views
1K
How did Becquerel discover the connection between phosphorescence and X-rays?
Jul 26, 2020
Replies
2
Views
2K
Why do people refer to the "fast axis" vs. "slow axis" of Diode Lasers?
Jul 18, 2020
Replies
2
Views
4K
Concentric Meniscus Lenses Design
Jul 18, 2020
Replies
3
Views
2K
Insight into polar coordinates (Newtonian mechanics)?
Jul 18, 2020
Replies
8
Views
1K
What Causes Molecules to Aggregate Over a Fiber in Optical Trapping?
Jul 18, 2020
Replies
2
Views
989
Why does light take a longer path in a rarer medium?
Jul 14, 2020
Replies
9
Views
1K
Why does the amount of Refraction depend on wavelength?
Jul 14, 2020
Replies
1
Views
1K
Modes of laser propagation in cylindrical optics
Jul 13, 2020
Replies
2
Views
960
Reflection and transmission of waves in a medium of nonuniform density
Jul 11, 2020
Replies
10
Views
2K
Is the length of the arm r in a polar coordinate a function of the angle?
Jul 11, 2020
Replies
27
Views
2K
A particle moving with zero radial acceleration in polar coordinates
Jul 10, 2020
Replies
2
Views
1K
Elliptical facet cylindrical optical fiber - Mathieu equation
Jul 6, 2020
Replies
1
Views
855
Classically, how can I explain Reflection?
Jul 3, 2020
Replies
4
Views
958
How to explain TE20 mode in a rectangular waveguide from reflection
Jul 1, 2020
Replies
2
Views
1K
Focus or parallelize the light from an LED
Jun 26, 2020
Replies
2
Views
1K
Internal reflection equation question
Jun 25, 2020
Replies
4
Views
2K
Interference of light by splitting the wavefront and recombining
Jun 23, 2020
Replies
8
Views
2K
Are Polycarbonate Sunglasses Effective Against UV Rays?
Jun 22, 2020
Replies
12
Views
1K
What are the key considerations for imaging with a condenser fresnel lens?
Jun 14, 2020
2
Replies
58
Views
6K
Understanding Zero-G Flight Physics: How Men Navigate Curved Paths in Airplanes
Jun 12, 2020
Replies
11
Views
1K
Geiger Counter and ultraviolet light sources
Jun 11, 2020
Replies
18
Views
4K
Y-component of the force vector in turning flight
Jun 8, 2020
Replies
10
Views
946
Can you make a more focused beam by using convex and concave lens?
Jun 4, 2020
Replies
1
Views
1K
Some Flight Calculations and the Motion of the Earth
May 28, 2020
Replies
11
Views
2K
Size of a light beam before and after Refraction
May 22, 2020
Replies
8
Views
2K
Photon wavelengths and frequencies
May 21, 2020
Replies
7
Views
987
Can anyone explain this derivation of the variable mass equation?
May 17, 2020
Replies
4
Views
1K
Brewster's angle and the intensity of reflected light
May 15, 2020
Replies
4
Views
2K
Strange optical phenomenon: lighting a candle in front of a TV screen
May 9, 2020
Replies
13
Views
4K
What is the lifetime of a photon in a medium?
May 7, 2020
Replies
3
Views
2K
Optical wireless communication ideas
May 6, 2020
Replies
10
Views
2K
Effect of stacking diffraction gratings
May 6, 2020
Replies
9
Views
1K
Refraction of Light: Myth or Reality?
May 4, 2020
2
Replies
41
Views
4K
Doppler effect and how it affects the light spectrum
Apr 17, 2020
Replies
3
Views
922
Trapping stiffness of optical tweezers
Apr 15, 2020
Replies
8
Views
1K
Frustrated Total Internal Reflection
Apr 11, 2020
Replies
6
Views
2K
Polarization of elliptical fiber modes
Apr 10, 2020
Replies
2
Views
1K
What is the meaning of polarization ratio?
Apr 7, 2020
Replies
1
Views
2K
Rearranging the equation for the cutoff condition in optical fibers
Apr 7, 2020
Replies
2
Views
1K
Light Reflection and Particle Size
Apr 3, 2020
Replies
3
Views
1K
How to find the length of a vector expressed in polar coordinates?
Apr 1, 2020
Replies
15
Views
1K
Polarization and intensity of a Gaussian beam
Mar 30, 2020
Replies
4
Views
1K
Real Fresnel diffraction experiment
Mar 28, 2020
Replies
1
Views
940
Why is the edge of the light from my flashlight beam so blurry?
Mar 28, 2020
Replies
1
Views
947
Wide-angle X-ray scattering (WAXS) spectroscopy
Mar 27, 2020
Replies
1
Views
1K
Exploring the Limitations of Diffraction: Fresnel vs. Fraunhofer
Mar 26, 2020
Replies
13
Views
1K
Evanescent and Gradient force on an optical waveguide
Mar 22, 2020
Replies
14
Views
2K
A question about different lens setups imaging a rotating stick
Mar 17, 2020
Replies
17
Views
903
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