HELP Question 4
The threshold wavelength for tungsten is 2,730 Angstrom, and the threshold wavelength for cesium oxide is 7.000 Angstrom. A particular light source
produces photoelectrons from cesium oxide but not from tungsten. Which of the following is the most reasonable value of the wavelength of the light
source?

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.

the total distance that martina travels that day is

(distance from home to mom's office) plus (distance from mom's office to school)

plus (distance from school to library) plus (distance from library to friend's house)

plus (distance from friend's house to martina's house).

(we don't know what any of these distance actually is.)