>photons have no mass >solar sail work choose one and only one

I honestly think we should build these, because aliens would laugh so fucking hard at us moving by shooting lasers into mirrored material. They'd be like no, we should step in and help.

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What is radiation pressure for $200?

>>8892601
>>photons have no mass
>>solar sail work
>choose one and only one
you need to do some research anon
>implying solar sail works by light photons and not charged particles in solar wind.

Just because light carries no mass doesn't mean it doesn't carry momentum.

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oh boy, oh boy

>>8892601
photons have no REST mass. but as they are never at rest ...

>>8892601
You know funnily enough, I was just thinking about this exact thing yesterday. Since I'm a brainlet I just assumed I was misinformed about what exactly a photon is. Can someone explain this?

>>8892620
DING DING

>>8892601
they do have mass, they wouldn't be moving if they didn't and that's not how solar sails work.

>>8892634

p = mv

when m = 0 so does p

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>>8892752
But Michio Kaku said so

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>>8892769
>Using Newtonian physics to describe photons
Were you born this stupid or did you have to work on it?

>>8892769
[math]E^2 = p^2 c^2 + m^2 c^4[/math]
If m = 0, E = pc. Light has energy, so it has momentum.

the bait my nigga

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>>8892769
>using p=mv to describe momentum of photons.

They can't, because scientist are brainlet cultist

>>8892785
>>8892789
>>8892825

so they don't really have momentum, they have some shit that humans try to understand by calling it momentum

top keking jej

>>8892845

Pendulums have been made to move by striking them with photons. Photon momentum is real.

>>8892845
>Some shit humans try to understand by calling it momentum
We invented the word so I think we are allowed to define what it is. And we understand it well enough to calculate it

>>8892769
>>8892845
>using overly simplistic highschool phsyics to try and describe higher concepts.
Go back to bed mate. you have school in the morning.
>What is p=h/λ

>>8892620
Yeah but why?

What about conservation of momentum?

>>8892601
photons can make electrons, which do have mass, "jump" ?

Mass isn't really required for pressure, any sort of charge might work

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>>8892620
yep lol

>>8892927
^this

this fact amazes me every day.

Not to mention electron spin being quantized and measurable with a similar apparatus not to mention a magnetic field.

>>8892601
it has momentum and therefore imparts a force

read about raditation pressure in stars

>>8892970

Photons have momentum, be less retarded next time.

>>8892601
Reminder to report shills like this and ignore crackpot posts

also

p=h/λ

>>8893092
You just gave the original statement again instead of answering my question

>>8892769
It's not zero, it's .0011111111111

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>>8892601
>>photons have no mass
>>solar sail work
>choose one and only one
Another day, another myriad of brainlets....

>>8892634
p=mv Anything * 0 always equals zero desu

>>8892752
>what is a null geodesic

>>8892620
>>8892634
>>8893030
>>8893092
this is of course the correct answer. Unlike matter, photon momentum is dependent on frequency instead of mass.

They transfer their momentum when absorbed, and twice their momentum when reflected. Verified experimentally a century ago, and via Japan's IKAROS solar sail mission this decade.

(Just bought Les Johnson's "Solar Sails" after seeing his lecture. He's currently planning a NASA solar sail mission in 2018: Near Earth Asteroid Scout!)

>>8892927

That doesn't mean that photons are little tiny basketballs that bounce off of shit

you can convert one form of energy into another

>>8892601
>implying photons exist

Prove that first. As far as I can tell, we really don't fully understand "light" or any other electro-magnetic wave.

>>8892601
Short answer - Newton's physics cannot describe photon momentum. Read up about how momentum and wavelength are related. Also read literally anything on basic quantum theory, the very first line will be: "photons have momentum, and here's why"

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>>8894532
ah yes, the photoelectric effect isn't a thing. go back to /pol where they deal with this type of autism

>>8894624
That doesn't prove photons exist anon.

The idea of discrete packets of energy is just a simplification that makes life easier for us. The fact is, we can't prove they actually exist. The photoelectric effect does not require "discrete packets of energy" and could just as easily be explained by light being a manifestation of energy itself, and not just another vessel which carries it. Because what is our universe without electromagnetic radiation? Does it exist without it? Does anything exist without the energy imparted by it? It seems that energy itself does not exist without it.

>>8894714
>being so stupid you contradict yourself in the same sentence
>What are nuclear forces?
>What are excitations of fields?
>whats matter?
>t. brainlet

>>8894714
You're just creating problems that would not exist had you bothered to learn the fucking science. What do you even mean by
>what is our universe without electromagnetic radiation
It's like asking "what's matter without atoms ?"

8.5/10 nice bait made me angry