What is the energy of a 1/2 Hz photon according to Planck's constant?

[Sheyr]

According to quantum mechanics the energy of radiation is equal to multiple Planck's constant : E = h * v, where "v" is the radiation frequency.

Since there is no limit to frequency, what is the energy of radiation of frequency 1/2 Hz?

S.

 

[neutrino]

h/2 J.101010

 

[selfAdjoint]

h/2 J.101010

Where h is expressed in SI units; Planck's constant has dimensions $$ML^2T^{-1}$$, so that would be $$Kg m^2 sec^{-1}$$.

 

[Sheyr]

Thank you. I thought before that the energy must be procuct of integer number of 'h'.

 

[neutrino]

Energy is emitted or absorbed in integer multiples of $$h\nu$$.

 

[Sheyr]

Energy is emitted or absorbed in integer multiples of $$h\nu$$.

If this is true, than the oscillator working on the frequency ½ Hz can’t emit the radiation. Or am I wrong?

 

[neutrino]

n*h*(nu)...it's the 'n' that's restricted to integers, not nu.

 

[selfAdjoint]

If you look at those units for h, $$ML^2T^{-1}$$, you see that it does not represent a quantum of energy, but of action. This is why energy can increase or decrease by continuous amounts, it is only the action, e dt, that is quantized.

 

[sneez]

If this is true, than the oscillator working on the frequency ½ Hz can’t emit the radiation. Or am I wrong?

if we assume photon can have the largest wavelength of the size of the universe and assume universe is 10^26m

by forumla c=lamb*nu

you can compute smallest nu and energy E=H*nu

: Photon is an energy emitted from internal atom/molecule transitions. There is no other way i know of photon can be created.

 

[Chaos' lil bro Order]

if we assume photon can have the largest wavelength of the size of the universe and assume universe is 10^26m

by forumla c=lamb*nu

you can compute smallest nu and energy E=H*nu

: Photon is an energy emitted from internal atom/molecule transitions. There is no other way i know of photon can be created.

What about electron/positron pair annihilation, this creates gamma rays.

 

[sneez]

"What about electron/positron pair annihilation, this creates gamma rays"

Very good. I forgot about this.

 

[whatta]

I thought any change of charged particle trajectory should generate photon.