The work function, W, is defined as the minimum amount of energy required to tea
ID: 1295852 • Letter: T
Question
The work function, W, is defined as the minimum amount of energy required to tear an electron off the metal. If the work function
for platinum is twice the work function for calcium, then the minimum energy of a light photon required to pop electrons off
the calcium is
Twice the photon energy for platinum
One and a half times the photon energy for platinum
The same photon energy as for platinum
Half the photon energy as for platinum
2. What is the single crucial characteristic that distinguishes an iron atom from a sodium atom?
A sodium atom has fewer neutrons in its nucleus than an iron atom
An iron atom has more protons in its nucleus than a sodium atom
A sodium atom is bigger than an iron atom
All of the above
3. Today, light is considered to be
Tiny particles of matter that move through space, having no wave properties at all
Electromagnetic waves only, with no particle properties
A phenomenon without sharp distinction between particle and wave
A phenomenon completely explainable via geometric ray optics
A.Twice the photon energy for platinum
B.One and a half times the photon energy for platinum
C.The same photon energy as for platinum
D.Half the photon energy as for platinum
Explanation / Answer
#1) D.Half the photon energy as for platinum
#2) D.All of the above
#3) A phenomenon without sharp distinction between particle and wave
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