There is direct evidence for the discreteness of energy levels in ...

[faduma]

There is direct evidence for the discreteness of energy levels in atoms.
 
  What will be an ideal response?

Question 2

In science, words always
 
  a. have the same meaning as common English words.
  b. mean very vague things, so scientists can hide their ignorance.
  c. have no reason for being; they must just be memorized.
  d. are used faddishly by scientists and the public.
  e. have specific meanings shared worldwide by all scientists.

[jjorrostieta]

Answer to Question 1

Yes, the atomic spectra, as seen in person or in Fig. 6.2 provide such evidence.

Answer to Question 2

E

[faduma]

Great answer, keep it coming

[Joy Chen]

Gracias!