A Beam of White Light of a Certain Frequency Is

question 32

Multiple Choice

A beam of white light of a certain frequency is incident on a metal surface. If the work function of this surface is 2.20 eV, what frequency of light would give a maximum kinetic energy of 0.25 eV to the photoelectrons ejected from this surface?

• A) 2.05 × 10¹⁴ Hz
• B) 1.02 × 10¹⁴ Hz
• C) 2.50 × 10¹⁴ Hz
• D) 3.53 × 10¹⁴ Hz
• E) 5.92 × 10¹⁴ Hz

---

Definitions:

Marginal Tax Rate

The percentage rate at which your final dollar of earnings is taxed, denoting the tax percentage applied to your income within each tax bracket you fall into.

Regressive Tax System

A tax system where the tax rate decreases as the taxable amount increases, placing a higher burden on lower-income individuals.

Taxpayers

Individuals or entities that are required to make payments to the government based on income, property, goods, and services.

Marginal Tax Rate

The rate at which the last dollar of a taxpayer’s income is taxed, indicating the percentage of additional income that will be taxed.