An optical fiber is 1.00 meter long and has a diameter of 20.0 m. ...

[corkyiscool3328]

An optical fiber is 1.00 meter long and has a diameter of 20.0 m. Its ends are perpendicular to its axis. Its index of refraction is 1.30.
 
  What is the minimum number of reflections a light ray entering one end will make before it emerges from the other end? A) 2.42  105
  B) 2.56  105
  C) 2.02  105
  D) 1.85  105
  E) 2.85  105

Question 2

In the two-slit experiment, the distance between the slits and the screen is 1.1 m and the distance between the slits is 0.040 mm. If the first-order bright fringe is measured to be 3.4 cm from the centerline,
 
  what is the distance between the adjacent bright fringes?
  A) 1.7 cm
  B) 5.1 cm
  C) 7.0 cm
  D) 6.8 cm
  E) 3.4 cm

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Answer to Question 1

D

Answer to Question 2

E

[corkyiscool3328]

Both answers were spot on, thank you once again

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Great! Please up vote