Early Photoelectric Light Detectors Were Based on Cesium

question 68

Multiple Choice

Early photoelectric light detectors were based on cesium. Cesium metal has a work function of 3.43 *10^-19 J. What is the longest wavelength of light that could be detected with one of these detectors?

• A) 759 nm
• B) 579 nm
• C) 679 nm
• D) 767 nm
• E) 455 nm

---

Definitions:

Accounts Used

Refers to specific accounts in the general ledger that are impacted by transactions and financial events of a business.

Recording Revenue

The process of documenting the income a company generates from its business activities, typically recognized when goods or services are delivered.

Increase in Assets

An upward adjustment or growth in the value of resources controlled by a company that are expected to bring future economic benefits.

Decrease in Liabilities

A reduction in the total amount of obligations (debts or dues) that a company owes to creditors or third parties.