## Used for Photons Only

$E=hv$

904914037
Posts: 65
Joined: Wed Sep 18, 2019 12:16 am

### Used for Photons Only

Could someone please explain why E=hv can only be used for photons? Thank you!

Hiba Alnajjar_2C
Posts: 108
Joined: Fri Aug 09, 2019 12:17 am

### Re: Used for Photons Only

I believe that the quantity of energy found in E=hv is just the smallest unit of energy for that particular frequency. It might help to think of the equation as E=(number of photons)*hv and, so, if your number of photons is just 1, then you're left with E=hv. You could then take that energy and multiply it by a greater number of photons to see how many Joules of energy would be in several photons rather than just one.

TarynD_1I
Posts: 100
Joined: Sat Aug 24, 2019 12:17 am

### Re: Used for Photons Only

E=hv is the equation used to solve for the energy of a particle of light, which is a photon.

904914037
Posts: 65
Joined: Wed Sep 18, 2019 12:16 am

### Re: Used for Photons Only

Thank you so much!

Lauren Lewis3L
Posts: 57
Joined: Wed Feb 20, 2019 12:16 am

### Re: Used for Photons Only

Is the "h" in the E=hv equation a constant value? Is this plank's constant?

Hiba Alnajjar_2C
Posts: 108
Joined: Fri Aug 09, 2019 12:17 am

### Re: Used for Photons Only

Yes, h is Planck's constant (6.626 x 10^-34 J*s)