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The Redness of Red: fact or fiction?
Sep 15, 2021
Replies
3
Views
585
Is classical Snell's law with a moving medium solvable?
Sep 9, 2021
Replies
9
Views
2K
I
Feynman's Vol 1 Lecture 26 Principle of Least Time (help with Figure)
Sep 7, 2021
Replies
2
Views
619
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How to make the best collimator using a system of lenses?
Aug 26, 2021
Replies
4
Views
906
Doppler Effect -- How fast would you need to go for a red light to appear green?
Aug 16, 2021
Replies
17
Views
3K
I
Simulating Star Images for Star Tracker Testing
Aug 14, 2021
Replies
3
Views
746
I
How Can One Derive the Diffraction Pattern Formula from a 1D Aperture?
Aug 8, 2021
Replies
2
Views
981
How to know what m value to plug into thin film interference equations
Aug 6, 2021
Replies
3
Views
8K
Why do rays of light from the Sun appear to be angled?
Jul 30, 2021
2
Replies
49
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6K
I
Compound Microscope System: Magnification Power Explained
Jul 29, 2021
Replies
5
Views
1K
I
What is really happening in collimation of rays?
Jul 27, 2021
Replies
7
Views
979
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How does polarisation in nature work?
Jul 25, 2021
Replies
4
Views
761
I
What Lens to Put In Front of an Complex Lens to Push Focal Plane Back?
Jul 21, 2021
Replies
2
Views
813
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Why we use spherical mirrors instead of parabolic mirrors?
Jul 15, 2021
Replies
18
Views
2K
Light Transmission Measurements: What Else Can You Find?
Jun 19, 2021
Replies
15
Views
1K
In optics what do Tp and Ts stand for and what are they?
Jun 17, 2021
Replies
3
Views
2K
Did Planck think the light emitted from black bodies to be quantised?
Jun 14, 2021
Replies
9
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1K
Mirror coating and BSDF measurement costs?
Jun 11, 2021
Replies
1
Views
697
Earth's Rotation & Global Agriculture: Impact & Possibilities
Jun 8, 2021
Replies
3
Views
938
Polar Ice Caps and the Earth's Speed of Rotation
Jun 8, 2021
Replies
1
Views
689
Fluorescence of a laser vs its pulse duration
Jun 7, 2021
Replies
1
Views
722
180 degree phase shift of reflected light
Jun 7, 2021
Replies
2
Views
1K
Measuring the speed of light in a straight line
Jun 1, 2021
Replies
19
Views
1K
Exploring the Possibilities of Sky Color
Jun 1, 2021
Replies
7
Views
957
How to model light from a star?
May 30, 2021
Replies
8
Views
722
Position of the principal points of a telephoto lens system
May 28, 2021
Replies
3
Views
877
Connect: Coupling Light from 2 LEDs into a Single Fiber
May 28, 2021
Replies
2
Views
2K
Can a continous wave laser be converted to a more powerful pulsed laser?
May 23, 2021
Replies
23
Views
2K
Optics question: Looking at mirrors from parallel to the surface
May 21, 2021
Replies
6
Views
870
How to estimate the interaction time of Raman scattering?
May 13, 2021
Replies
1
Views
570
Crosstalk Algorithm - Optical system
May 9, 2021
Replies
12
Views
908
Optics Equations - to reduce height
May 4, 2021
Replies
5
Views
1K
Calculating distance between lux meter and light source
May 3, 2021
Replies
2
Views
1K
Optical versus digital reflections
Apr 30, 2021
Replies
13
Views
810
Mirrors spontaneously cracking
Apr 29, 2021
Replies
8
Views
12K
Virtual and real image with concave mirror at 45 degrees
Apr 27, 2021
Replies
4
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1K
RF transmitter inside a metal enclosure, re. reflections
Apr 24, 2021
Replies
32
Views
2K
Interferometer delay & line light spreading
Apr 23, 2021
Replies
2
Views
636
Mirror box with 1 candela of luminous intensity light source
Apr 21, 2021
3
Replies
72
Views
4K
Power inside a microwave oven due to reflections
Apr 13, 2021
Replies
15
Views
1K
What is it about ice that makes it so reflective?
Mar 31, 2021
Replies
20
Views
3K
Critical angle (symmetry of refraction) confusion
Mar 23, 2021
Replies
5
Views
2K
Using constructive interference of audio frequency waves to lower distortion
Mar 22, 2021
Replies
3
Views
1K
ِAngular distribution of a scattered field
Mar 16, 2021
Replies
2
Views
657
Double Glazed Window Reflection
Mar 10, 2021
Replies
25
Views
5K
Rotation of the plane of polarization of light by glucose
Mar 8, 2021
Replies
4
Views
1K
ABCD matrix formalism for concave mirror
Mar 7, 2021
Replies
5
Views
2K
Question about whether UV light can penetrate a cardboard box
Mar 3, 2021
Replies
22
Views
5K
Interference colors on a vinyl record
Mar 1, 2021
Replies
26
Views
2K
Calculating the degree of polarization of reflecting light
Mar 1, 2021
Replies
2
Views
1K
Achieving the speed of light at the end of a whip
Feb 20, 2021
Replies
15
Views
3K
Basic question pertaining to Polar Coordinates & how to employ them
Feb 20, 2021
Replies
2
Views
643
Lensmaker's equation when the 2 mediums on both sides of the lens are different
Feb 15, 2021
Replies
1
Views
2K
Question on Optical Systems and Lenses
Feb 15, 2021
Replies
1
Views
691
MCNPX , problem of detecting the photons in lattices
Feb 14, 2021
Replies
1
Views
755
Is this a diffraction pattern?
Jan 24, 2021
Replies
10
Views
1K
Does twisted light violate Fermat's principle?
Jan 20, 2021
Replies
11
Views
1K
A way to make the standing-wave patterns in a microwave oven visible
Jan 13, 2021
Replies
4
Views
1K
The sources of error in a diffraction grating experiment
Jan 12, 2021
Replies
7
Views
5K
Spectrum of laser light absorbed and re-emitted by a white object
Jan 12, 2021
Replies
7
Views
1K
Classical explanation for microwave door shielding
Jan 10, 2021
Replies
19
Views
2K
Instrument using two concave lenses
Jan 9, 2021
Replies
3
Views
980
Does the ruby laser (the first invented laser) have nonlinear behavior?
Jan 5, 2021
Replies
5
Views
1K
A heavier person vs. a lighter person diving into a pool
Jan 5, 2021
Replies
6
Views
1K
Can heavy objects be used to modulate light waves with small amplitude?
Dec 27, 2020
Replies
4
Views
795
What causes this curious light phenomenon? (video inside)
Dec 25, 2020
Replies
11
Views
1K
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
Views
1K
Particle analysis of diffraction
Dec 16, 2020
Replies
1
Views
519
How does a wave with circular polarization behave?
Dec 15, 2020
Replies
9
Views
1K
Interference in thin films; confusion regarding geometry
Dec 14, 2020
Replies
4
Views
669
Suspended particles and the index of refraction
Dec 11, 2020
Replies
8
Views
929
How does the speed of light change when it enters glass?
Dec 9, 2020
Replies
12
Views
2K
Can Light Travel Faster Than the Speed of Light in Glass?
Dec 9, 2020
Replies
18
Views
1K
Is Light a Wave or a Particle?
Dec 7, 2020
Replies
17
Views
22K
Circuits and the Speed of Light (2)
Dec 4, 2020
Replies
2
Views
984
Circuits and the Speed of Light
Dec 4, 2020
Replies
2
Views
678
How Does VIS-NIR Reflectance Linearity Vary in Mixed Color Pigments?
Dec 1, 2020
Replies
4
Views
729
A living thing made of different photonic molecules?
Dec 1, 2020
Replies
2
Views
863
Correction of horizontal astigmatism in an anamorphic lens
Nov 28, 2020
Replies
1
Views
776
Deriving the Law of Reflection from Huygens Principle
Nov 28, 2020
Replies
5
Views
1K
What is it that makes light rebound off a surface?
Nov 27, 2020
Replies
1
Views
2K
Where do photons come from? Exploring the origin of photon emission in a vacuum
Nov 25, 2020
Replies
17
Views
1K
Can we see real, inverted and magnified images without a screen?
Nov 24, 2020
Replies
4
Views
1K
Exploring Compton Scattering and Backscatter Scanners
Nov 18, 2020
Replies
1
Views
812
Diffraction of light and conservation of energy.
Nov 15, 2020
Replies
3
Views
1K
Negative Concave Lens - Creating a Beam Expander
Nov 14, 2020
Replies
7
Views
2K
Lens selection for close proximity surface photos
Nov 12, 2020
Replies
11
Views
883
Adding Zooming Capability to my Far Infrared Spectrum Sensor
Nov 6, 2020
Replies
12
Views
1K
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
906
Does a material change the direction of polarization of light?
Nov 1, 2020
Replies
7
Views
1K
Question about two-stage light gas guns
Oct 30, 2020
Replies
1
Views
727
Acoustic reflections from an elliptical wall in Urbino city (Italy)
Oct 29, 2020
Replies
2
Views
801
Reflection of inverted waves to form a standing wave
Oct 22, 2020
Replies
3
Views
993
Differences between X-rays and Gamma rays
Oct 16, 2020
Replies
3
Views
979
Can you calculate optical density from permittivity and permeability?
Oct 10, 2020
Replies
19
Views
1K
Why does a divergent lens create an interference pattern?
Oct 7, 2020
Replies
3
Views
1K
Apparatus for a polarization filter rotator dial
Oct 2, 2020
Replies
6
Views
1K
Why can't two laser beams from two sources Interfere if they have a difference phase?
Sep 19, 2020
Replies
10
Views
2K
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