## E=hv

$c=\lambda v$

Lauryn Shinno 2H
Posts: 59
Joined: Fri Sep 28, 2018 12:24 am

### E=hv

In the equation E=hv, I know E stands for energy, but specifically what energy? Like threshold energy or energy of the photons?

Samantha Ito 2E
Posts: 64
Joined: Fri Sep 28, 2018 12:29 am

### Re: E=hv

E stands for energy per photon.

Tony Chung 2I
Posts: 60
Joined: Fri Sep 28, 2018 12:19 am

### Re: E=hv

The equation tells us that E is the energy of light, which is also called a photon.

Abhi4F
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Joined: Fri Sep 28, 2018 12:28 am

### Re: E=hv

In this equation, E is the energy of light (photons) in Joules.

Soyoung Park 1H
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Joined: Sat Sep 29, 2018 12:15 am

### Re: E=hv

What does a photon of energy mean?

LorenzoDuvergne3I
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Joined: Fri Sep 28, 2018 12:25 am

### Re: E=hv

Soyoung Park 1H wrote:What does a photon of energy mean?

A photon is the smallest measurable unit of electromagnetic energy (light)

daniela3D
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Joined: Fri Sep 28, 2018 12:25 am

### Re: E=hv

Keep in mind that a photon is always positive.

Tamera Scott 1G
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### Re: E=hv

I've also seen E=hf once, does anyone know if that is the same as E=hv?

904936893
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Joined: Fri Sep 28, 2018 12:29 am

### Re: E=hv

Tamera Scott 3L wrote:I've also seen E=hf once, does anyone know if that is the same as E=hv?

v is frequency, so I believe f would just be another way to denote frequency.

Brian Chang 2H
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Joined: Fri Sep 28, 2018 12:17 am

### Re: E=hv

E is the energy of light, which is measured in photons. A photon is the quantum of electromagnetic radiation.

Danny Zhang 4L
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### Re: E=hv

Tamera Scott 3L wrote:I've also seen E=hf once, does anyone know if that is the same as E=hv?

I believe that f and v both symbolize frequency. I think that v is just more commonly used in chemistry while f is more preferred in physics.

Xingzheng Sun 2K
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Joined: Fri Sep 28, 2018 12:29 am

### Re: E=hv

Since electromagnetic radiation acts like particles, E in this equation stands for the energy per photon.

Zubair Ahmed 1L
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Joined: Fri Sep 28, 2018 12:16 am

### Re: E=hv

yes, E represents the amount of energy per photon. The units for E is Joules.

Noh_Jasmine_1J
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Joined: Fri Sep 28, 2018 12:15 am

### Re: E=hv

Tamera Scott 3L wrote:I've also seen E=hf once, does anyone know if that is the same as E=hv?

v is the symbol for frequency, so both equations are equivalent