Consider two diffraction gratings with the same slit separation, ...

[charchew]

Consider two diffraction gratings with the same slit separation, the only difference being that one grating has 3 slits and the other 4 slits. If both gratings are illuminated with a beam of the same monochromatic light
 
  A) the grating with 3 slits produces the greater separation between orders.
  B) the grating with 4 slits produces the greater separation between orders.
  C) both gratings produce the same separation between orders.
  D) both gratings produce the same separation between orders, but the orders are better defined with the 4-slit grating.

Question 2

A closed organ pipe of length 0.750 m is played when the speed of sound in air is 340. m/s. What is the fundamental frequency?
 
  A) 0.228 kHz
  B) 0.113 kHz
  C) 570. Hz
  D) 57.0 Hz
  E) 171. Hz

[Mochi]

Answer to Question 1

D

Answer to Question 2

B

[charchew]

Great answer, keep it coming

[tkempin]

Thanks for the timely response, appreciate it