A Photocathode That Has a Work Function of 2

question 44

Multiple Choice

A photocathode that has a work function of 2.4 eV is illuminated with monochromatic light having photon energy 3.5 eV.What is the wavelength of this light? (c = 3.00 × 10⁸ m/s,h = 6.626 × 10^-34 J ∙ s,1 eV = 1.60 × 10^-19 J)

• A)350 nm
• B)330 nm
• C)300 nm
• D)380 nm
• E)410 nm

---

Definitions:

Government Programs

Initiatives and services provided by the government designed to support the welfare, safety, and needs of its citizens.

Interest Groups

Organizations formed to represent the interests and concerns of specific groups or industries to influence public policy and decision-making.

Registered

Refers to the act of recording personal or official information in a formal or official list.

Lobby

A lobby is a group of people seeking to influence politicians or public officials on a particular issue.