If Barium Has a Work Function of 2

question 34

Multiple Choice

If barium has a work function of 2.60 eV,what is its cutoff wavelength when used as a phototube target? (h = 6.63 x 10^-34 J*s,c = 3.00 x 10⁸ m/s,1 eV = 1.60 x 10^-19 J and 1 nm = 10^-9 m)

• A)398 nm
• B)478 nm
• C)497 nm
• D)596 nm

---

Definitions:

Close Outline View

The action of exiting or terminating the outline view mode in a document or presentation software, reverting to a standard view.

Table Of Contents

A list located at the beginning of a document that includes the titles and page numbers of the sections it contains.

Cross-Reference

A reference in a document to another section of the document, providing navigational ease and information contextualization.

References List

A list at the end of a document or study that cites all the sources of information, such as books, articles, and websites, used within the work.