All Questions
41
questions
1
vote
1
answer
26
views
Spectroscopy on colored flames
When observing colored fire through a spectrometer after adding substances like copper chloride or magnesium sulfate to change its color, what specific spectra are typically observed? How does the ...
- 43
15
votes
6
answers
7k
views
Why color depends on frequency and not on wavelength? [duplicate]
To explain my question lets consider this example:
The wavelength of light in a medium is $\lambda=\lambda_{0}/\mu$, where $\lambda_{0}$ is the wavelength in vacuum. A beam of red light ($\lambda_{0}=...
- 2,517
8
votes
4
answers
3k
views
Do colours which are not visible to human eyes exist?
Are there any colours that our human eye cannot comprehend but other animals can see? The ability to see colours is the property of our eyes. For example an average dog would see less colours than us. ...
- 412
1
vote
3
answers
72
views
Wavelengths of light outside our solar system
The question might have been asked before. Our Sun's rays decompose into 7 elementary colors by using a prism or spectrometry. Can the the colors (their number and wave length in the spectrum ) be ...
- 1,032
-2
votes
1
answer
260
views
What is the wavelength of red light in vacuum?
According to Wikipedia,
It has a dominant wavelength of approximately 625–740 nanometres.
However, I'm not sure in which medium this wavelength was measured. Was this wavelength measured in a vacuum?...
- 1,018
1
vote
4
answers
103
views
Light as a wavelength [closed]
I am learning that light is an electromagnetic wave, does this wave travel in every direction simultaneously from the source of light? I am trying to visualize this concept but I haven’t seen an ...
- 11
0
votes
1
answer
64
views
If a human was moving fast enough how bright would the blue-shifted heat be? Would it be detectable by an average human eye on an average night?
I guess another way to answer this question would be if our eyes had the capability to detect the peak black-body wavelength that is emitted by humans would it be enough radiation to detect if we were ...
0
votes
1
answer
290
views
What is the distribution of different wavelengths in single ray of white light? Does it remain constant?
Given the sun as the source of light for the above question, does the incident of different visible wavelengths same on a given surface, at a particular time and duration, even if the sun is rotating ...
- 13
-2
votes
1
answer
58
views
If frequency of light never changes, is there finite number of blue light, red light, etc.?
AFAIK light's frequency cannot change. If that is the case, would it mean that there is a finite amount of every frequency floating around in the universe? ie. some finite number of 400hz light rays, ...
- 121
3
votes
4
answers
2k
views
Electron wavelength vs. light(s) wavelengths
I am doing some research into wave and waveform. I am looking at different types of microscopy for potential purchase. However, I came across Max Knoll a minute ago and I am curious as to how ...
- 31
0
votes
1
answer
198
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Is there a finite number of colors in the visible spectrum? [duplicate]
Does quantum theory and Planck's length of $1.6\times10^{-35}\ \mathrm{m}$ mean that the electromagnetic spectrum is not continuous as every photon can only carry a discrete amount of energy?
If so, ...
- 11
10
votes
7
answers
2k
views
Do the "colors" live in a 3-dimensional vector space? [closed]
Do the "colors" form a 3-dimensional vector space?
Colors are just different frequencies of electromagnetic lights, from the low frequency (infra-red, red) to the high frequency (blue, ...
- 4,336
20
votes
8
answers
5k
views
What does the "true" visible light spectrum look like? [closed]
When I google "visible light spectrum", I get essentially the same image. However, in each of them the "width" of any given color is different.
What does the "true" ...
- 337
6
votes
1
answer
2k
views
Does a single photon have a wavelength or not? [duplicate]
I have read this question where anna v says:
The photon is an elementary particle in the standard model of particle physics. It does not have a wavelength.
What exactly is meant by the wavelength of ...
- 29k
0
votes
2
answers
196
views
Could we see through objects if our eye could detect other wavelengths of light?
We see objects around us because light reflects off the surface and enters our eye. So if our eyes could see a wider range of the spectrum (maybe lower wavelength as they would scatter less) then ...
