Determine Planck's Constant from gradient

In summary, Planck's constant (h) is a fundamental constant in physics that relates the energy of a photon to its frequency. It can be determined from the gradient of a graph that plots photon energy against frequency, with the gradient being equal to h divided by the charge of an electron. Determining Planck's constant is significant as it helps us understand the behavior of light and other electromagnetic radiation at a quantum level, and has practical applications in fields such as electronics and telecommunications. The unit of measurement for Planck's constant is joule-second (J·s) in the International System of Units (SI). It was first calculated by Max Planck in 1900 using experimental data on blackbody radiation.
  • #1
ZedCar
354
1

Homework Statement



Determine Planck's Constant from gradient

Homework Equations





The Attempt at a Solution



I have a graph entitled "Photoelectric effect: stopping voltage as a function of light frequency"

The y-axis is the Stopping Voltage (V), the x-axis the Frequency (Hz).

How do I determine Planck's Constant (h) from the gradient?

Thanks!
 
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  • #2
What is the kinetic energy of a photo-emitted electron?
 
  • #3
ZedCar said:

Homework Equations

Why is your "Relevant equations" section blank? It is a photoelectric effect problem, look up the equation that describes the photoelectric effect.
 

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