In the Photoelectric Effect, what is mean by 'threshold frequency' and how does the magnitude a photons frequency effect the electron it is absorbed by?
The threshold frequency is the minimum frequency a photon can be and still just overcome the work function (Φ) of a particular material. The threshold frequency is directly proportional to the work function and is given by f=E/h, where E is equal to Φ, f is the threshold frequency and h is Planck's constant.Providing the frequency of the photon is greater than the threshold frequency, the electron absorbing the photon will escape the material. However, if the frequency of the photon is greater than this the electron will have excess energy after escaping the surface of the material, which is present as kinetic energy, given by Ek = E - Φ (E is given by E=hf).
JH
Related Physics A Level answers
All answers ▸There is a train A. On the roof of A is another frictionless train B of mass Mb. A mass Mc hangs off the front of A and is attached to the front of B by rope and frictionless pulley. How fast should A accelerate so that B wont fall off the roof of A.
What is the equivalence principle of General Relativity and what does it mean?
A car of mass M and a maximum power output of P is on an rough inclined plane Θ to the horizontal. What is the maximum velocity (v). Coefficient of friction=μ and air resistance=kv where k is constant
What is the derivative of distance with respect to time.