Optics Forum

Post thread
Undergrad Can light sails really power starships?
  • · Replies 6 ·
Replies
6
Views
2K
High School An interesting phenomena with light I experienced
  • · Replies 1 ·
Replies
1
Views
1K
High School Phase and Phase difference......Can somebody enlighten me?
  • · Replies 5 ·
Replies
5
Views
1K
High School What Can a Mobile Phone Camera Lens Reveal That the Naked Eye Can't?
  • · Replies 9 ·
Replies
9
Views
3K
High School How to calculate the real size of an object from image
  • · Replies 3 ·
Replies
3
Views
3K
High School Image of a virtual object by a plane mirror
  • · Replies 4 ·
Replies
4
Views
9K
Undergrad Math in the thin lens equation
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Plasmonic pixels could be used to make non-fading paint
  • · Replies 1 ·
Replies
1
Views
1K
Graduate A System with Velocity More than Speed of the Light
  • · Replies 8 ·
Replies
8
Views
2K
Graduate Ray transformation of a 3d lens?
  • · Replies 8 ·
Replies
8
Views
2K
High School Simple Optics Q: Green Filter + Blue Light = ??
  • · Replies 4 ·
Replies
4
Views
2K
Do soap bubbles reflect sound?
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Do Photons from one star affect other stars?
  • · Replies 5 ·
Replies
5
Views
1K
Graduate Diffraction - Amplitude and Phase
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Speed of light; source; frame of reference
  • · Replies 5 ·
Replies
5
Views
1K
Undergrad How can I create an adjustable liquid lens system for windows?
  • · Replies 18 ·
Replies
18
Views
3K
Graduate Can Light Affect Spacetime without Being Affected?
  • · Replies 4 ·
Replies
4
Views
1K
Undergrad Can We Truly See the Entire Sun?
  • · Replies 21 ·
Replies
21
Views
3K
Undergrad A question about the light spectrum
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Why does light reflect at exactly 180 degrees?
  • · Replies 21 ·
Replies
21
Views
5K
Graduate Proof of image formation property of spherical mirrors
  • · Replies 1 ·
Replies
1
Views
2K
High School Understanding the Apparent Depth Equation: Explained and Simplified
  • · Replies 4 ·
Replies
4
Views
8K
Graduate Does increasing kVp in x-ray production increase the number of x-ray photons?
  • · Replies 2 ·
Replies
2
Views
2K
High School Forming an Image with a Convex Lens
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad Is Light Truly Waves or Particles?
  • · Replies 12 ·
Replies
12
Views
3K
Graduate Deriving Laser Intensity proportional to N Molecules
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Brewster's Angle and P-Polarization in Laser Design
  • · Replies 2 ·
Replies
2
Views
2K
Graduate [Diffraction] Can a glass slide magnify an object on it?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Near Lightspeed Space Exploration - Query
  • · Replies 1 ·
Replies
1
Views
1K
The Interaction of Sound and Light - Comments
  • · Replies 4 ·
Replies
4
Views
2K
High School Da Vinci's flying machine meets solar sail?
  • · Replies 22 ·
Replies
22
Views
3K
Graduate Detecting Photons: Uncovering the Invisible Particles
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Does light always travel at light speed?
  • · Replies 48 ·
2
Replies
48
Views
7K
Graduate The Mystery of the Missing Pi Phase Shift in Gaussian Beam Interference
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Why can't I kill the ice cubes >:o (in a Microwave Oven)
  • · Replies 10 ·
Replies
10
Views
4K
Graduate Is it possible to see Newton rings in CT (xray) images?
  • · Replies 2 ·
Replies
2
Views
1K
Graduate Photons always take the quickest route
  • · Replies 17 ·
Replies
17
Views
2K
Undergrad Infrared rays can't be used outside for communicaiton
  • · Replies 4 ·
Replies
4
Views
3K
Graduate Effect of Collimated lens on Gauss Beam
  • · Replies 6 ·
Replies
6
Views
2K
Undergrad Struggling with light calculations (incident power output)
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Coupling a ccd to a surgical loupe
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad Blocking violet light leakage in UV lights
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Does Microwave support only Line of sight communication LOS?
  • · Replies 2 ·
Replies
2
Views
2K
Undergrad What is the meaning of the speed of light "squared"?
  • · Replies 18 ·
Replies
18
Views
4K
High School Concave mirror: Reflected rays do not meet at one point
  • · Replies 12 ·
Replies
12
Views
3K
Graduate Optical band gap of a cobalt ferrite
  • · Replies 6 ·
Replies
6
Views
2K
Graduate IF you could travel faster than light, would time cease or
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad Why does cos(phi1- phi 2 +kX)=cos(kx)?
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Few questions on light interacting with atoms
  • · Replies 4 ·
Replies
4
Views
2K
High School What is causing the strange light phenomenon in my bedroom?
  • · Replies 6 ·
Replies
6
Views
7K
Undergrad What causes light to bend in refraction
  • · Replies 3 ·
Replies
3
Views
3K
Undergrad Do non-monochromatic "waves" exist in dispersive media?
  • · Replies 7 ·
Replies
7
Views
2K
Undergrad Trajectory of scattered alpha particle
  • · Replies 1 ·
Replies
1
Views
3K
Undergrad Reflections of Light in Contact lens
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Want to build multi-spectral imaging device for cheap
  • · Replies 1 ·
Replies
1
Views
2K
High School Angle of incidence and refraction
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Reversal of Handedness by Reflection
  • · Replies 1 ·
Replies
1
Views
2K
Graduate The principle of least action and diffraction
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Intelligent Light: Communicating with Far Objects in Universe
  • · Replies 26 ·
Replies
26
Views
3K
Undergrad Confusion With Derivation of Fresnel Equations
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Understanding the Relationship Between Resistance and Brightness in Lightbulbs
  • · Replies 7 ·
Replies
7
Views
3K
Graduate Understanding Reflectance with Fresnel Equation for Non-Polarized Light
  • · Replies 1 ·
Replies
1
Views
2K
High School Does Light Speed Change in Water?
  • · Replies 10 ·
Replies
10
Views
4K
Graduate Communication faster than light or where is my mistake?
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Can polarized light be recovered after passing through multiple mediums?
  • · Replies 3 ·
Replies
3
Views
1K
High School How does lightning work? (one strike or multiple strikes?)
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Lower speed of light inside a transparent medium
  • · Replies 17 ·
Replies
17
Views
3K
High School Help with lenses for hand-made telescope
  • · Replies 3 ·
Replies
3
Views
2K
High School Can the speed of light change?
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad Requirement of two vernier scales in a spectrometer?
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Can Superconducting Sheets Reflect Gravity?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Mo Anode X-ray Filtering in Mammography: Why is Mo Ideal?
  • · Replies 3 ·
Replies
3
Views
1K
Graduate Diffraction integral : incident field is FT?
  • · Replies 9 ·
Replies
9
Views
2K
Graduate No double refraction (birefrigence)?
  • · Replies 22 ·
Replies
22
Views
3K
Graduate Relation between the absorption coefficient and the transmittance spectrum
  • · Replies 2 ·
Replies
2
Views
2K
Graduate Phase cancellation of light - Is it possible to make light disappear?
  • · Replies 38 ·
2
Replies
38
Views
31K
High School Connect two objects with visible light
  • · Replies 2 ·
Replies
2
Views
1K
Undergrad What is the Verdet Constant of SF59 Glass at 650nm?
  • · Replies 1 ·
Replies
1
Views
6K
Graduate Can fast objects get cooked by Cosmic Microwave background?
  • · Replies 4 ·
Replies
4
Views
1K
Graduate What Happens to Our Vision with Negative Refraction in Lenses?
  • · Replies 1 ·
Replies
1
Views
1K
Graduate Central force and acceleration in the polar direction
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Backscatter setup - one way mirror
  • · Replies 1 ·
Replies
1
Views
1K
Undergrad Best way to separate almost parallel light rays?
  • · Replies 11 ·
Replies
11
Views
2K
High School How does light travel through semi-opaque surfaces?
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad How much Gravity is needed to bend light?
  • · Replies 2 ·
Replies
2
Views
6K
Graduate Incoherence of Light Sources: Phase Difference & Intensity
  • · Replies 3 ·
Replies
3
Views
2K
High School Wavelengths corresponding to fractions of nanometers?
  • · Replies 29 ·
Replies
29
Views
3K
High School What's the difference between a virtual and a real image
  • · Replies 10 ·
Replies
10
Views
48K
Undergrad Apparent depth conceptual question
  • · Replies 7 ·
Replies
7
Views
7K
Undergrad Why do Lasers need to be cooled?
  • · Replies 3 ·
Replies
3
Views
2K
Graduate Managing X-Ray Hardness and Low Frequency Use in Tissue Analysis
  • · Replies 5 ·
Replies
5
Views
4K
Graduate Max Photon Energy: Planck Length Lower Limit?
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad Infinity Focal Points of Plane Mirror
  • · Replies 6 ·
Replies
6
Views
4K
Undergrad Extinction Index K: Expression & Calculations
  • · Replies 3 ·
Replies
3
Views
2K
Undergrad Distance between fringes in an interference pattern?
  • · Replies 4 ·
Replies
4
Views
5K
Graduate Possible alternative title:Why doesn't a 100W laser have a 100W kick back?
  • · Replies 15 ·
Replies
15
Views
2K
Undergrad Source of light in Michelson-Morley experiment
  • · Replies 6 ·
Replies
6
Views
2K
High School Why don't clouds refract light?
  • · Replies 15 ·
Replies
15
Views
7K
Graduate Is polar coordinate system non inertial?
  • · Replies 7 ·
Replies
7
Views
5K
Undergrad Total internal reflection, refractive index, optical fibres
  • · Replies 1 ·
Replies
1
Views
2K