Can You Calculate Planck's Constant Without Knowing the Energy of the Particle?

In summary, the conversation discusses how to calculate Planck's constant using the stopping potential and threshold frequency. The formula E=hf is mentioned and the importance of finding the slope of the graph in determining 'h'. The concept of Bremsstrahlung and photoelectric effect is also briefly mentioned.
  • #1
admajoremdeigloriam
23
0
if you are given the stopping potential and the threshold frequency, how do you calculate Planck's constant from it?
 
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  • #2
HINT:Assume all the energy of the electron/accelerated particle is converted into an energy of the photon...


Daniel.
 
  • #3
ive used E=hf
hf= Kmax + PHI
Kmax=eV

all it does is bring me round and round
 
  • #4
Hold on a second.Are talking about Bremsstrahlung,or photoelectrical effect...?I though u meant the former,but apparently i was wrong.Usually there's the plot KE vs incoming photon's frequency and u find "h" from the slope...

Daniel.
 
  • #5
we are given a graph of stopping potential (y-axis) vs frequency (x-axis) that's it
 
  • #6
the stopping potential hits 0 at threshold frequency of 43.9 e13 Hz
 
  • #7
Well,the stopping potential is

[tex] V=\frac{KE_{particle}}{q_{particle}} [/tex]

Either way,u need the slope of that line.

Daniel.
 
  • #8
but we are not iven the E of the particle?
 

1. What is Planck's constant?

Planck's constant (denoted as h) is a fundamental physical constant that relates the energy of a photon to its frequency.

2. How is Planck's constant calculated?

Planck's constant can be calculated by dividing the energy of a photon by its frequency. It can also be calculated using various experimental methods, such as the photoelectric effect or blackbody radiation.

3. What is the value of Planck's constant?

The currently accepted value for Planck's constant is 6.626 x 10^-34 joule seconds (J·s).

4. Why is Planck's constant important?

Planck's constant is important because it is a key constant in quantum mechanics, which describes the behavior of particles on a very small scale. It is used in many equations and calculations, including those related to atomic and molecular structure, atomic and nuclear processes, and the behavior of particles at the subatomic level.

5. Is Planck's constant a universal constant?

Yes, Planck's constant is considered a universal constant, meaning its value remains the same regardless of the reference frame or location in the universe. It is one of the fundamental constants of nature and is used in many different fields of science.

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