What Wavelength of Light Is Required to Cause the Ejection $\varPhi$

question 24

Multiple Choice

What wavelength of light is required to cause the ejection of photoelectrons with kinetic energies of 5.0 *10^-20 J from a calcium surface ( $\varPhi$ = 4.60 * 10^-19 J) ?

• A)485 nm
• B)390 nm
• C)308 nm
• D)632 nm
• E)480 nm

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Optimal Weights

In portfolio management, it refers to the proportionate holdings of different assets that maximize the portfolio's expected return for a given level of risk.

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Anticipated return on an investment, often based on historical data or the inherent risk of the investment.

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This type of return measures the performance of an investment, taking into account the timing and magnitude of inflows and outflows of money.

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