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:

MIRR

Modified Internal Rate of Return (MIRR) is a financial metric that evaluates the profitability of investments, adjusting the internal rate of return (IRR) to account for the reinvestment of cash flows at a different rate.

Present Value

The current value of a future amount of money or stream of cash flows, discounted at a certain interest rate.

Future Value

The amount a present sum will grow into at a specified interest rate over a specified period of time.

Profitability Index

A calculation that determines the relationship between the costs and benefits of a proposed project through the ratio of present value of future cash flows over the initial investment.