Calculate the Wavelength, in Nanometers, of the Light Emitted by a Hydrogen

question 38

Multiple Choice

Calculate the wavelength, in nanometers, of the light emitted by a hydrogen atom when its electron falls from the n = 7 to the n = 4 principal energy level. Recall that the energy levels of the H atom are given by E_n = -2.18 * 10^-18 J(1/n²)

• A) 9.18 * 10^-20 nm
• B) 4.45 * 10^-20 nm
• C) 2.16 * 10^-6 nm
• D) 2.16 * 10³ nm
• E) 1.38 * 10¹⁴ nm

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Definitions:

Direct Materials

Raw materials that are directly traceable to the manufacturing of a specific product and included in its cost.

Conversion Costs

Expenditures associated with transforming raw materials into final products, often comprising direct labor costs and indirect manufacturing expenses.

Equivalent Units

A concept used in process costing that converts partially completed units into an equivalent number of fully completed units to accurately measure inventory and cost of goods sold.

Weighted-Average Method

A method of costing inventory that determines the cost of goods sold and the closing inventory by averaging the cost of all items available for sale throughout the period.