A Metal Having a Work Function of 2

question 5

Multiple Choice

A metal having a work function of 2.8 eV is illuminated with monochromatic light whose photon energy is 3.9 eV. What is the threshold frequency for photoelectron production? (h = 6.626 × 10^-34 J ∙ s, 1 eV = 1.60 × 10^-19 J)

• A) 6.8 × 10¹⁴ Hz
• B) 2.7 × 10¹⁴ Hz
• C) 7.6 × 10¹⁴ Hz
• D) 8.5 × 10¹⁴ Hz
• E) 9.4 × 10¹⁴ Hz

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Definitions:

Stored-value Money

A type of electronic money that is stored on a card or a digital wallet, representing a claim on a predefined amount of currency.

Gift Cards

Prepaid stored-value money cards issued by a retailer or bank, used as an alternative to cash for purchases within a particular store or related businesses.

Electronic Checks

Electronic checks, or e-checks, are a form of digital payment where money is electronically withdrawn from the payer's checking account, transferred over the ACH network, and deposited into the payee's account.

B2B

Business-to-Business, describing transactions or relationships between two companies, as opposed to between a company and individual consumers.