A Metal Having a Work Function of 2

question 42

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:

Pulmonary Ventilation

The process of moving air into and out of the lungs, facilitating gas exchange with the internal environment, mainly by bringing in oxygen and flushing out carbon dioxide.

Anaerobic Respiration

A type of respiration that occurs without oxygen, often producing energy less efficiently than aerobic processes.

Gas Exchange

The biological process through which organisms exchange gases (such as oxygen and carbon dioxide) with their environment, crucial for respiration.

Diffuses

The process by which molecules move from an area of higher concentration to an area of lower concentration.