In this figure a light ray travels between air and glass. Which ...

[JMatthes]

In this figure a light ray travels between air and glass. Which way did the light ray go?
   

 
   
  a.
  from the air into the glass
   
  b.
  from the glass into the air
   
  c.
  either A or B.
   
  d.
  None of the abovethis depicts an impossible situation.

Question 2

A 0.20-km wide river has a uniform flow speed of 4.0 m/s toward the east. It takes 20 s for a boat to cross the river to a point directly north of its departure point on the south bank. In what direction must the boat be pointed in order to accomplish this?
 a. 23 west of north
  b. 20 west of north
  c. 24 west of north
  d. 22 west of north
  e. 17 west of north

[ecox1012]

Answer to Question 1

c

Answer to Question 2

d

[JMatthes]

Thanks for the timely response, appreciate it

[amandanbreshears]

Excellent