Menu
News
All News
Dungeons & Dragons
Level Up: Advanced 5th Edition
Pathfinder
Starfinder
Warhammer
2d20 System
Year Zero Engine
Industry News
Reviews
Dragon Reflections
Columns
Weekly Digests
Weekly News Digest
Freebies, Sales & Bundles
RPG Print News
RPG Crowdfunding News
Game Content
ENterplanetary DimENsions
Mythological Figures
Opinion
Worlds of Design
Peregrine's Next
RPG Evolution
Other Columns
From the Freelancing Frontline
Monster ENcyclopedia
WotC/TSR Alumni Look Back
4 Hours w/RSD (Ryan Dancey)
The Road to 3E (Jonathan Tweet)
Greenwood's Realms (Ed Greenwood)
Drawmij's TSR (Jim Ward)
Community
Forums & Topics
Forum List
Latest Posts
Forum list
*Dungeons & Dragons
Level Up: Advanced 5th Edition
D&D Older Editions
*TTRPGs General
*Pathfinder & Starfinder
EN Publishing
*Geek Talk & Media
Search forums
Chat/Discord
Resources
Wiki
Pages
Latest activity
Media
New media
New comments
Search media
Downloads
Latest reviews
Search resources
EN Publishing
Store
EN5ider
Adventures in ZEITGEIST
Awfully Cheerful Engine
What's OLD is NEW
Judge Dredd & The Worlds Of 2000AD
War of the Burning Sky
Level Up: Advanced 5E
Events & Releases
Upcoming Events
Private Events
Featured Events
Socials!
Twitch
YouTube
Facebook (EN Publishing)
Facebook (EN World)
Twitter
Instagram
TikTok
Podcast
Features
Top 5 RPGs Compiled Charts 2004-Present
Adventure Game Industry Market Research Summary (RPGs) V1.0
Ryan Dancey: Acquiring TSR
Q&A With Gary Gygax
D&D Rules FAQs
TSR, WotC, & Paizo: A Comparative History
D&D Pronunciation Guide
Million Dollar TTRPG Kickstarters
Tabletop RPG Podcast Hall of Fame
Eric Noah's Unofficial D&D 3rd Edition News
D&D in the Mainstream
D&D & RPG History
About Morrus
Log in
Register
What's new
Search
Search
Search titles only
By:
Forums & Topics
Forum List
Latest Posts
Forum list
*Dungeons & Dragons
Level Up: Advanced 5th Edition
D&D Older Editions
*TTRPGs General
*Pathfinder & Starfinder
EN Publishing
*Geek Talk & Media
Search forums
Chat/Discord
Menu
Log in
Register
Install the app
Install
The
VOIDRUNNER'S CODEX
is LIVE! Explore new worlds, fight oppressive empires, fend off fearsome aliens, and wield deadly psionics with this comprehensive boxed set expansion for 5E and A5E!
Community
General Tabletop Discussion
*Geek Talk & Media
Is Time Travel (going backwards) Possible?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Nellisir" data-source="post: 6041712" data-attributes="member: 70"><p>I think this falls over the edge of my understanding, but here goes. Keep in mind that this is the first time I've ever actually tried to make sense of redshifting and wavelengths, so it's very possible I've gotten something totally wrong or backwards.</p><p></p><p>Redshift isn't a property of the photon itself. The photon doesn't age or turn red as it travels. Redshifting is a property of one object travelling away from another object, and the wave (not particle) of light between the two. If the two objects are static in relation to each other, there is no redshift, regardless of the time or distance.</p><p></p><p>In our universe, however, <strong>on a intergalactic scale</strong>, everything is moving away from everything, in all directions. We are all dots on a balloon, and the balloon is inflating. (If this gets you going about curvature, then it's a flat piece of balloon being pulled from the perimeter). Because the expansion is speeding up, older things are moving faster, and are more redshifted.</p><p></p><p>Since time = distance, and time = speed, therefore further = older = faster = more redshift.</p><p></p><p>Light is photons, which are particles, but it is also a wave. The wavelength is the distance over which the wave's shape repeats. Imagine that there's a line between two objects, and that line has a repeating wave pattern. Let's say that there are....30 waves between Object A and Object B. The length between each wave equals X. If the objects are static, X is unchanged. If the objects begin to move together,the waves get tighter and X becomes shorter (X-, aka blueshift). If the objects move apart, X becomes longer (X+, aka redshift). The distance between waves is increasing, but the quantity of waves remains the same. There's still 30 waves, but they have to stretch to accommodate the increasing distance. That's redshift. The wavelength (distance between the same point on two adjoining waves) of light increases as objects move apart.</p></blockquote><p></p>
[QUOTE="Nellisir, post: 6041712, member: 70"] I think this falls over the edge of my understanding, but here goes. Keep in mind that this is the first time I've ever actually tried to make sense of redshifting and wavelengths, so it's very possible I've gotten something totally wrong or backwards. Redshift isn't a property of the photon itself. The photon doesn't age or turn red as it travels. Redshifting is a property of one object travelling away from another object, and the wave (not particle) of light between the two. If the two objects are static in relation to each other, there is no redshift, regardless of the time or distance. In our universe, however, [B]on a intergalactic scale[/B], everything is moving away from everything, in all directions. We are all dots on a balloon, and the balloon is inflating. (If this gets you going about curvature, then it's a flat piece of balloon being pulled from the perimeter). Because the expansion is speeding up, older things are moving faster, and are more redshifted. Since time = distance, and time = speed, therefore further = older = faster = more redshift. Light is photons, which are particles, but it is also a wave. The wavelength is the distance over which the wave's shape repeats. Imagine that there's a line between two objects, and that line has a repeating wave pattern. Let's say that there are....30 waves between Object A and Object B. The length between each wave equals X. If the objects are static, X is unchanged. If the objects begin to move together,the waves get tighter and X becomes shorter (X-, aka blueshift). If the objects move apart, X becomes longer (X+, aka redshift). The distance between waves is increasing, but the quantity of waves remains the same. There's still 30 waves, but they have to stretch to accommodate the increasing distance. That's redshift. The wavelength (distance between the same point on two adjoining waves) of light increases as objects move apart. [/QUOTE]
Insert quotes…
Verification
Post reply
Community
General Tabletop Discussion
*Geek Talk & Media
Is Time Travel (going backwards) Possible?
Top