Tagged Questions
2
votes
1answer
30 views
Relation of color and frequency for the visible spectrum
In this question the OP is looking for a way to see light that is outside of the visible spectrum without using electronic sensors. This got me wondering about the visible spectrum itself. Typically ...
4
votes
1answer
75 views
The Effects of Moving Matter Across Light-Year distances
If I were to stand at one end of a light-year long metal pole, and another person were to stand one light-year away at the other end, and then I were to push on my end of the pole. How long would it ...
3
votes
1answer
159 views
Does $\lambda\nu = c$ hold for all the waves in the universe?
Are all waves in the universe the same as electromagnetic waves?
Basically, my question arises from an equation I found in my chemistry textbook:
$$\lambda \nu ~=~ c.$$
This states that the ...
0
votes
1answer
257 views
Speed of Light, Photons or WaveSpeed?
The speed of light is almost 300 000 km/s.
The photons have a speed along the wave, and the wave have a speed straight forwards.
What is the speed of light? Is it the speed the photons have along ...
3
votes
2answers
899 views
why is mechanical waves faster in denser medium while EM waves slower?
Why is it that mechanical waves/longitudinal waves/sound travel faster in a denser/stiffer medium as in steel compared to say air, while EM waves/trasverse waves/light travels slower in a (optically) ...
3
votes
2answers
1k views
How is the speed of light calculated?
How is the speed of light calculated? My knowledge of physics is limited to how much I studied till high school. One way that comes to my mind is: if we throw light from one point to another (of known ...
