The Work Function of a Certain Metal Is 1

question 55

Multiple Choice

The work function of a certain metal is 1.90 eV.What is the longest wavelength of light that can cause photoelectron emission from this metal? (1 eV = 1.60 × 10^-19 J,c = 3.00 × 10⁸ m/s,h = 6.626 × 10^-34 J ∙ s)

• A)231 nm
• B)14.0 nm
• C)62.4 nm
• D)344 nm
• E)654 nm

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Definitions:

Activity Variance

Activity variance calculates the difference between the planned quantity of activity and the actual quantity, analyzing the impact on costs and operational efficiency.

Direct Labor

The wages and benefits paid for the labor directly involved in the production of goods or services.

Budgeting

The method of devising a strategy for allocating your finances, detailing an entity's economic and functional objectives.

Activity Variance

The difference between planned activity levels and actual activity levels in budgeting and accounting.