The person who expounded the uncertainty principle was
a. Max Planck
b. Albert Einstein
c. Neils Bohr
d. Erwin Schroedinger
e. Werner Heisenberg.
Question 2
The spectra of different elements can be distinguished because
a. they have the same spectral lines, but the lines are of different intensities
b. they have spectral lines in different positions
c. every element has one unique spectral line
d. none of the above