Questions related to the perception and measurement of light (primarily in the visible range), its mathematical description, the reproduction of colors by different means, color combinations, etc. Please use the tag [electromagnetic-radiation] if you want to refer to the general form of light.

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1answer
191 views

Describing the path of light from a moving source with waves [closed]

Can anyone explain the path of light to me, using a wave model, that show the angled path in different reference frames?
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0answers
58 views

How can Einstein explain particles of light without particles?

how can Einstein explain particles of light without particles? For his Nobel prize he used Newtons explanation except both he and Newton agreed that aether solved the problem of going through holes. ...
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1answer
76 views

What is the speed photons coming out from headlights of a car running 100 km/h? [duplicate]

And, technically, would the color of the light change at different car speeds?
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votes
1answer
164 views

how can u split the Photon? [closed]

If any equations are there ,for split the light particle, means that i have a 1m length of light just consider that in that who can i split the light particle into 1/2 m length Pls tell
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1answer
52 views

is it possible to extract spectrum (color in general) from an animal [closed]

if i may ask....can this be ASAP? :3 my problem: okay this is going to sound lame, but i was wondering if it is possible to extract color (specifically spectrum) from an animal. this question ...
-4
votes
1answer
127 views

Is it possible to make a light beam act like a stream of water from a spining hose? [closed]

If we had the ability to make an actuator that could turn around at or past the speed of light and I attached a high miliwatt laser to it, then spun the laser around on the actuator at the speed of ...
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1answer
87 views

Photonics: Slab As a Lens [closed]

The question can be found here: http://gyazo.com/fc4d26cd35e6ce368ad2a8ed504f1dcc The refractive index it references can be found here: http://gyazo.com/94fd2f3b5ea7da9226c3acd56b0024c1 I'm not ...
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votes
2answers
156 views

Do the laws of physics that apply to all observers also apply to a non-observer? [closed]

The Timelessness of a photon https://www.youtube.com/watch?v=5ELA3ReWQJY An observer's laws of physics are time based. "When you're traveling at the speed of light, time does not exist" - Neil ...
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3answers
235 views

Could some Red and Blue shifts be the result of light passing through “dark matter”? [closed]

As i see it, light behaves in certain ways, as the Double Slit experiement shows, So when light comes into contact with dark matter, it becomes both a wave and a particle, the wave is bent around the ...
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2answers
2k views

Does shadow have mass? [closed]

I know it sounds like a foolish question but I have a reason for asking and I'm hoping someone here, can give a convincing response. Here is why I pose the question...it seems to me that all this ...
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2answers
445 views

Are shadows underwater “wet”? [closed]

Sorry if this is the wrong place to post this but it seemed the most appropriate. I read a riddle earlier today that mentioned something about shadows underwater and it got me thinking.. Would a ...
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votes
1answer
163 views

how can u control the speed of light? [closed]

The light traveling a 3 lake km/sec, but Pls tell me how can a control the speed of light, means can limit the speed like 2 lake km/sec are 1 lake km/sec Pls tell me equation
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5answers
385 views

Is velocity of light constant? [duplicate]

There is a difference between the concept of the speed of light and the velocity of light. are both of them constant ($dc=0$ and $dv_c=0$)? if yes, why?