The energy level diagram for hydrogen 
-The energy of a photon emitted in a transition from the n = 3 state to the n = 2 state is __________.
Definitions:
Casting
A manufacturing process where a liquid material is poured into a mold and solidifies to take on a specific shape.
Finishing
is the process of completing the final stages of manufacturing to prepare products for sale, such as painting, polishing, or packaging.
Direct Labor-Hours
The total number of work hours spent by employees who are directly involved in the manufacturing process.
Traditional Costing
An accounting method that allocates overhead costs to products based on a predetermined rate, often labor or machine hours.
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