Graduation Diploma is valid for only one (1) year in order to take the FDNY computer based. exam (Z-50). Candidates who fail the final examination on the second attempt shall be required to re-. attend the course in its entirety.
Quantum dots (QD) are very small semiconductor particles, only several nanometres in size, so small that their optical and electronic properties differ from those of larger particles. They are a central theme in nanotechnology.
The spin quantum number, also known as the fourth quantum number, is a number value that describes the orientation of an electron occupying an orbital. The symbol that we will use for the spin quantum number is ms. Let's visualize the spin quantum number. The value of ms=+1/2 is shown by an arrow pointing upwards and is also said to be spin up. The value of ms=-1/2 is shown by an arrow pointing downwards and is also said to be spin down.