A Metal Having a Work Function of 2

question 2

Multiple Choice

A metal having a work function of 2.5 eV is illuminated with white light that has a continuous wavelength band from 400 nm to 700 nm.For which one of the following ranges of the wavelength band in this white light are photoelectrons NOT produced? (h = 6.626 × 10^-34 J • s,c = 3.00 × 10⁸ m/s,
1 eV = 1.60 × 10^-19 J)

• A) 500 nm to 700 nm
• B) 400 nm to 560 nm
• C) 500 nm to 560 nm
• D) 400 nm to 500 nm
• E) 560 nm to 700 nm

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Definitions:

Government Failure

Situations where government interventions in the economy lead to inefficient outcomes, worsening the problem they intended to solve.

Efficient Allocation

The optimal distribution of resources among competing uses, aiming to maximize the overall benefit or utility from those resources.

Government Failure

A situation where government intervention in the economy causes inefficiencies or leads to an allocation of resources worse than the free market.

Competitive Markets

Markets where multiple sellers and buyers interact under the principles of supply and demand to determine prices and output without significant restrictions or monopolies.