The homework question I have is"For the second, fourth, sixth, and seventh levels of the three-dimensional cubical box, find the energies in terms of the quantity E0 π2ℏ2/(2mL2), where m is the particle mass and L is the box's sidelength."However, I'm not confused on how to solve it. The question I have is this - in this situation, how would I determine what the nx, ny, and nz would be for each new energy level? I know you can use a table, but I'm not going to have that in a test situation. How do I determine that the 6th energy level should be (3^2 +2^2 +1^2)?

none, its a machine

spectral lines lyman is one set

where are the vectors ?

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia