Which of the Following Is Essential for Laser Action to Occur

question 3

Multiple Choice

Which of the following is essential for laser action to occur between two energy levels of an atom?

• A)the lower level is metastable
• B)the upper level is metastable
• C)the lower level is the ground state
• D)the are more atoms in the lower level than in the upper level
• E)the lasing material is a gas

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Definitions:

Security Interest

A financial mechanism that gives a lender priority over the borrower's assets or property in the case of default.

Financing Statement

A document filed by a creditor to indicate a security interest in the personal property of a debtor, used to perfect a lien.

Perfection

In the context of securing interests in property, it is the process of completing all required legal steps to enforce a security interest against third parties.

Chattel Paper

A document or records indicating both a monetary obligation and a security interest in or lease of specific goods.