If a Quantum of Radiation Has an Energy of 2

question 18

Multiple Choice

If a quantum of radiation has an energy of 2.0 keV,what is its wavelength? (h = 6.63 x 10^-34 J*s,1 eV = 1.60 x 10^-19 J,c = 3.00 x 10⁸ m/s,and 1 nm = 10^-9 m)

• A)0.32 nm
• B)0.41 nm
• C)0.62 nm
• D)1.02 nm

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Definitions:

Ledger

A book or other collection of financial accounts of a particular type or for a specific purpose in accounting.

Journal

A formal record where all financial transactions of a business are initially recorded, date-wise, before being posted to the general ledger.

Trial Balance

A statement that lists all the balances of the general ledger accounts of a business at a particular time to check the correctness of double-entry bookkeeping.

Ledger Balance

The total balance of all accounts in a ledger at a particular point in time, reflecting the current financial position.