An electron is in an infinite square well (a box) that is 2.0 nm ...

[formula1]

An electron is in an infinite square well (a box) that is 2.0 nm wide.
 
  The electron makes a transition from the n = 8 to the n = 7 state, what is the wavelength of the emitted photon?(h = 6.626  10-34 J  s, mel = 9.11  10-31 kg, 1 eV = 1.60  10-19)
  A) 880 nm
  B) 750 nm
  C) 610 nm
  D) 1000 nm
  E) 1100 nm

Question 2

A 3.10-eV electron is incident on a 0.40-nm barrier that is 5.67 eV high.
 
  What is the probability that this electron will tunnel through the barrier? (1 eV = 1.60  10-19 J, mel = 9.11  10-31 kg,
   h = 1.055  10-34 J  s, h = 6.626  10-34 J  s)
  A) 1.4  10-3
  B) 9.0  10-4
  C) 1.0  10-3
  D) 1.5  10-3
  E) 1.2  10-3

[jsm54321]

Answer to Question 1

A

Answer to Question 2

A

[formula1]

TYSM

[bulacsom]

Thanks for the timely response, appreciate it