textbook question

[George_Zhu]

What is the meaning of the question 1A11 on page9?

[Ethan McCarthy 1F]

I believe the question is asking for us to convert the values given in the table to fill in for the missing values. For instance, the table gives the frequency 8.7x10^(14) Hz, so it is asking us to calculate the corresponding wavelength, energy of the photon, and match to the corresponding event (i.e. was the student reading, getting an x-ray, microwaving popcorn, or sun tanning).

[Leah farhadi 1F]

Question 1A.11 asks why spectral lines are classified as being in different series. The lines show the energy difference from on discrete energy level to another, i.e from n=4 to n=2. The way that they are classified is based on the lowest energy level, for example Lyman series the lowest energy level is n=1 in the UV region and Balmer series n=2 is the lowest energy level in the visible region.