Photoelectric Effect: When a Certain Metal Is Illuminated by Light

question 22

Multiple Choice

Photoelectric effect: When a certain metal is illuminated by light, photoelectrons are observed provided that the wavelength of the light is less than 669 nm. Which one of the following values is closest to the work function of this metal? (h = 6.626 × 10^-34 J ∙ s, c = 3.00 × 10⁸ m/s, 1 eV = 1.60 × 10^-19 J)

• A) 1.9 eV
• B) 2.0 eV
• C) 2.2 eV
• D) 2.3 eV

---

Definitions:

Trade

The exchange of goods or services between individuals, businesses, or countries.

Lower Opportunity Cost

The advantage of choosing an option that has a relatively smaller loss of potential gain from other alternatives.

Trade

The exchange of goods and services between people or entities, often involving the transfer of money.

Goods

Tangible products that satisfy human wants and provide utility, which people buy and use.