Calculating energy from flux and max wavelength

In summary, flux is a measure of energy passing through a unit area over a unit time, typically measured in watts per square meter. The maximum wavelength, or peak wavelength, is the wavelength at which an object emits the most energy, usually measured in meters. To calculate energy from flux and max wavelength, the formula E = hc/λmax is used, with units of joules (or electron volts in some cases). This calculation is applicable to all types of radiation, including electromagnetic and particle radiation.
  • #1
ShalinNayak
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0
hey I am calculating energy of a blackbody emitter, and i have the flux (energy per unit area) and the peak wavelength emitted. how do i calculate total energy?
 
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  • #2
Since you have your peak wavelength, use Wein's Displacement Law to find the temperature of your black body emitter:

[itex]\lambda[/itex][itex]_{max}[/itex] T = 2897.8 um-K

Then apply Stepan-Boltzmann Law to find total power:

E = [itex]\sigma[/itex] T[itex]^{4}[/itex].
 

FAQ: Calculating energy from flux and max wavelength

What is flux?

Flux is a measure of the amount of energy passing through a unit area over a unit time. It is typically represented by the symbol Φ and is measured in units of watts per square meter (W/m²).

What is the maximum wavelength?

The maximum wavelength, also known as the peak wavelength, is the wavelength at which an object emits the greatest amount of energy. It is represented by the symbol λmax and is typically measured in units of meters (m).

How do you calculate energy from flux and max wavelength?

The energy can be calculated using the formula E = hc/λmax, where h is Planck's constant (6.626 x 10^-34 J·s), c is the speed of light (3.00 x 10^8 m/s), and λmax is the maximum wavelength in meters.

What are the units of energy in this calculation?

The units of energy in this calculation are joules (J). However, in some cases, the energy may be expressed in electron volts (eV) when dealing with very small scales.

Can this calculation be used for any type of radiation?

Yes, this calculation can be used for any type of radiation, including electromagnetic radiation, such as light and radio waves, as well as particles, such as photons and electrons.

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