The distance between the slits in the two-slit experiment is 1.50 ...

[ap345]

The distance between the slits in the two-slit experiment is 1.50  10-5 m. A beam of light of wavelength 600 nm is used and the distance between the slit and the screen is 2.00 m.
 
  What is the distance on the screen between the central bright fringe and the 4th order bright fringe? A) 0.132 m
  B) 0.201 m
  C) 0.324 m
  D) 0.528 m
  E) 0.688 m

Question 2

Strictly speaking, the sum of the angles on a triangle equals 180 degrees
 
  A) in flat space.
  B) on a spherical surface.
  C) on a saddle-shaped surface.
  D) all or any of the above
  E) none of the above

[cam1229]

Answer to Question 1

C

Answer to Question 2

Answer: A