Replying to Avatar π–‹π–Žπ–†π–™π–‰π–Šπ–“π–Žπ–Šπ–— (Β―`◕‿◕´¯)

If E=mc2 is true, then the amount of energy needed for something to travel at the speed of light is infinite! Now imagine the energy needed to sustain that speed for 650M lightyears. For you to say, the amount energy needed to create that light is large but not large enough to burn every other galaxy in it vicinity is just not plausible. Either the galaxy is not 650M lightyears away or E=mc2 is wrong or both could be wrong πŸ€·πŸ»β€β™‚οΈπŸ˜†
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iefan πŸ•ŠοΈ 2y ago

Firstly, it is impossible for an object with mass to travel at the speed of light, Light does not carry any mass in the traditional sense, as it is composed of massless particles called photons.

The energy needed to create light is not related to the energy needed to sustain a certain speed.

The energy from a galaxy's light is spread out over a vast distance and is not concentrated enough to cause any significant heating or burning of nearby galaxies.

And also we not observing these faraway stars & galaxies using normal light.

But I respect your opinion, I may not agree with it but that's a beauty freedom.

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π–‹π–Žπ–†π–™π–‰π–Šπ–“π–Žπ–Šπ–— (Β―`◕‿◕´¯) 2y ago

You are regurgitating what they told you without questioning how rational or logical they are but if that makes you happy, carry on 😁

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Petri Pulkkinen 2y ago

Sorry to butt in, but I think what iefan means is that the formula is EΒ²=(mcΒ²)Β²+(pc)Β².

E=mcΒ² is only a special case of that: when an object is not moving relative to you and it has mass.

Light has no mass. And that’s why the special case for that is E=pc.

So no, E=mcΒ² doesn’t always hold true. Unfortunately physicists have failed to explain that clearly to us laypeople. Alas, much lamenting among them about this confusion…