Work function is the minimum amount of work required to remove an electron from a solid to a point in vacuum outside the solid surface.
A small value of work function means that it is easy to remove electrons from the surface of the solid.
We will first start by arranging metals based on their work functions (from largest to smallest).
The six metals have the work functions, W.
Part A. Rank these metals on the basis of their cutoff frequency. Rank from largest to smallest. To rank items as equivalent, overlap them.
Part B. Rank these metals on the basis of the maximum wavelength of light needed to free electrons from their surface. Rank from largest to smallest. To rank items as equivalent, overlap them.
Part C. Each metal is illuminated with 400 nm (3.10 eV) light. Rank the metals on the basis of the maximum kinetic energy of the emitted electrons. (If no electrons are emitted from a metal, the maximum kinetic energy is zero, so rank that metal as smallest.) Rank from largest to smallest. To rank items as equivalent, overlap them.
Cesium: w = 2.1 eV
Aliminium: w = 4.1 eV
Beryllium: w = 5.0 eV
Potassium: w = 2.3 eV
Platinium: w = 6.4 eV
Magnesium: w = 3.7 eV
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Photoelectric Effect concept. You can view video lessons to learn Photoelectric Effect. Or if you need more Photoelectric Effect practice, you can also practice Photoelectric Effect practice problems.
What professor is this problem relevant for?
Based on our data, we think this problem is relevant for Professor Carraher's class at FAU.