When it's wet it wipes.Links 'n' stuff:The video I just did on stovetops:https://youtu.be/ff04ecF9DfwTechnology Connections on Mastodon:https://mas.to/@TechC...
Yes, what we call the speed of light is really the speed of light in a vacuum. When light passes through a medium like water or glass it travels slower. That causes the light to be refracted which means that it changes direction slightly based on the energy of the light (color) and the refractory index the material. Glass will refract a red laser by a certain amount while water will refract it by a different amount.
Fun fact, because different colors refract differently, when you shine a white light through a specially shaped piece of glass called a prism, you will see a rainbow pattern.
Also a gas! Astronomical spectroscopy is fascinating.
“The star radiates at [these] wavelengths meaning it has [this] composition, after the light bounces off/through the planet we see <these> wavelengths, meaning it has <this> composition.”
In a manner of speaking. Individual photons (if you view light as particles) don’t change their speed from C, but as light interacts with matter the wavefront propagates more slowly through the medium. You can think of photons as “bouncing off of atoms” if that helps to visualize why it’s moving slower.
“Light changes speed” ???
Yes, what we call the speed of light is really the speed of light in a vacuum. When light passes through a medium like water or glass it travels slower. That causes the light to be refracted which means that it changes direction slightly based on the energy of the light (color) and the refractory index the material. Glass will refract a red laser by a certain amount while water will refract it by a different amount.
Fun fact, because different colors refract differently, when you shine a white light through a specially shaped piece of glass called a prism, you will see a rainbow pattern.
https://www.science-sparks.com/wp-content/uploads/2019/06/shutterstock_1194072568-1024x606.jpg.webp
Also a gas! Astronomical spectroscopy is fascinating.
“The star radiates at [these] wavelengths meaning it has [this] composition, after the light bounces off/through the planet we see <these> wavelengths, meaning it has <this> composition.”
TIL, thanks!
Yes? C is constant and light travels at C in a vacuum, but lights speed is different in other media.
In a manner of speaking. Individual photons (if you view light as particles) don’t change their speed from C, but as light interacts with matter the wavefront propagates more slowly through the medium. You can think of photons as “bouncing off of atoms” if that helps to visualize why it’s moving slower.
Congratulations! you are one of today’s lucky 10,000!
I’m annoyed someone downvoted you for asking an innocent question
Wait till you see gravitational lensing!