Photoelectric effect (1 Viewer)

[squishyau]

Is the whole photoelectric effect encapsulated with in the dot point: Identify Einstein’s contribution to quantum theory and its relation to black body radiation?
I'm confused as to where this whole section of the book fits into the syllabus, thanks.

 

[dawooddaman]

In 1905 Einstein combined Planck’s hypothesis that the energy of radiation was quantized and the particle model of light to explain the photoelectric effect, as follows:

1. Light behaves like particles called photons, each carries a discrete package of energy. (related by E=hf). The collisions between photons and electrons lead to the photoelectric effect.
2. Only photons with energy above the work function (W) of a metal can cause the photoelectric effect. The work function is the minimum energy required to free electrons from the metal surface. The minimum frequency the light must have to cause the photoelectric effect in a metal is called the threshold frequency. The kinetic energy of the photoelectrons released is determined by: Ek = hf-w
3. A photon can either transfer all of its energy to an electron or none.

Graphically
Plotting the maximum kinetic energies of photoelectrons emitted against the frequencies of the illuminating EMR for one particular metal surface will result in the graph as shown

• The slope of the graph is equal to Planck’s constant h.
• The x-int of the graph is equal to the threshold frequency. If a metal with a larger work function is used this point shifts to the right
• The absolute value of the y-int is equal to the work function. If a metal with a larger work function is used then the y-int shifts downwards.

 

[someth1ng]

No, there's a few parts to it.

DESCRIBE HERTZ’S OBSERVATION OF THE EFFECT OF A RADIO WAVE ON A RECEIVER AND THE PHOTOELECTRIC EFFECT HE PRODUCED BUT FAILED TO INVESTIGATE

IDENTIFY DATA SOURCES, GATHER, PROCESS AND ANALYSE INFORMATION AND USE AVAILABLE EVIDENCE TO ASSESS EINSTEIN’S CONTRIBUTION TO QUANTUM THEORY AND ITS RELATION TO BLACK BODY RADIATION

IDENTIFY EINSTEIN’S CONTRIBUTION TO QUANTUM THEORY AND ITS RELATION TO BLACK BODY RADIATION

IDENTIFY DATA SOURCES, GATHER, PROCESS AND PRESENT INFORMATION TO SUMMARISE THE USE OF THE PHOTOELECTRIC EFFECT IN PHOTOCELLS

 

[squishyau]

So what would I classify the work function etc under?

 

[someth1ng]

So what would I classify the work function etc under?

Einstein's contribution...

 

[RishBonjour]

So what would I classify the work function etc under?

work function is under photo electric effect which falls under planck/einstein's contribution to quantum physics etc (as far has HSC goes).

 

[squishyau]

hence the original questions, cheers for the help though

 

[squishyau]

Also, do we need to know in detail Thompson's plum pudding model when discussing the Rutherford dot point?