A single slit, which is 0.050 mm wide, is illuminated by light of ...

[HCHenry]

A single slit, which is 0.050 mm wide, is illuminated by light of 550 nm wavelength. What is the angular separation between the first two minima on either side of the central maximum?
 
  A) 0.36
  B) 0.47
  C) 0.54
  D) 0.63
  E) 1.3

Question 2

A mass is attached to a vertical spring and bobs up and down between points A and B. Where is the mass located when its potential energy is a maximum?
 
  A) at either A or B
  B) midway between A and B
  C) one-third of the way between A and B
  D) one-fourth of the way between A and B
  E) none of the above

[Mochi]

Answer to Question 1

D

Answer to Question 2

A

[HCHenry]

TYSM

[sailorcrescent]

Gracias!