## Planck's constant

$E=hv$

connie 2C
Posts: 106
Joined: Thu Jul 11, 2019 12:17 am

### Planck's constant

What is the purpose of plugging in Planck's constant into the formula E=hv? What is the formula for?

Kehlin Hayes 4C
Posts: 50
Joined: Wed Sep 18, 2019 12:17 am

### Re: Planck's constant

Plugging in Planck's constant is in reference to measuring how much energy is exerted by photons.

EthanPham_1G
Posts: 104
Joined: Sat Jul 20, 2019 12:17 am

### Re: Planck's constant

The unit of Planck's constant is in J*s. When multiplying Planck's constant by the frequency of the wave which is in units 1/s, the seconds will cancel and you are left with Joules which are a unit of energy. This tells how much energy is in one photon of light.

Alex Hitti 3E
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Joined: Sat Aug 17, 2019 12:17 am

### Re: Planck's constant

Planck's constant is critical as a constant because it relates the energy of a photon to its frequency.

alex_4l
Posts: 109
Joined: Thu Sep 26, 2019 12:18 am

### Re: Planck's constant

This equation also shows that energy is directly proportional to frequency! The equation E=hc/lambda shows that energy is indirectly proportional to wavelength.

Manav Govil 1B
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Joined: Sat Sep 07, 2019 12:19 am

### Re: Planck's constant

The equation helps us calculate the energy of light. Planks constant has the units: J*s, which cancels out with the frequency units: 1/s. It helps us find the energy in J (Joules).

Posts: 54
Joined: Sat Jul 20, 2019 12:17 am

### Re: Planck's constant

The purpose of the constant has to do with its units and obviously the value it has in the equation. When its units cancel out with frequency you are left with Joules, the desired unit for energy which is the purpose of the equation (to find how much energy a wave has).

Megan Jung 3A
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Joined: Thu Jul 11, 2019 12:17 am

### Re: Planck's constant

Planck's constant is 6.626 x10^-34 J s. It is used to relate the energy of a particle to its frequency. The equation E=hv, we can be manipulated to h=E/v. Therefore, h or Planck's constant gives the ratio of energy to frequency and its relationship between these two variables.

nicole-2B
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Joined: Fri Aug 30, 2019 12:18 am

### Re: Planck's constant

Megan Jung 3A wrote:Planck's constant is 6.626 x10^-34 J s. It is used to relate the energy of a particle to its frequency. The equation E=hv, we can be manipulated to h=E/v. Therefore, h or Planck's constant gives the ratio of energy to frequency and its relationship between these two variables.

Thank you for your explanation on what the equation shows us.

Tahlia Mullins
Posts: 105
Joined: Thu Jul 25, 2019 12:15 am

### Re: Planck's constant

Planck’s constant is a vital component of the e=hv equation because it relates the amount of energy emitted to the speed, is with units J.s