When a beam of light, which is traveling in air, is reflected by ...

[joblessjake]

When a beam of light, which is traveling in air, is reflected by a glass surface, there is
 
  A)
 
  a 90 phase change in the reflected beam.
  B)
 
  no phase change in the reflected beam.
  C)
 
  a 180 phase change in the reflected beam.
  D)
 
  a 60 phase change in the reflected beam.
  E)
 
  a 45 phase change in the reflected beam.

Question 2

Two toy cars (16 kg and 2.0 kg) are released simultaneously on an inclined plane that makes an angle of 30 with the horizontal. Make a statement which best describes their acceleration after being released.
 
  A)
 
  The 16-kg car accelerates 8 times faster than the 2.0-kg car.
  B)
 
  The 16-kg car accelerates 2 times faster than the 2.0-kg car.
  C)
 
  The 2.0-kg car accelerates 8 times faster than the 16-kg car.
  D)
 
  The 2.0-kg car accelerates 2 times faster than the 16-kg car.
  E)
 
  Both cars accelerate at the same rate.

[cam1229]

Answer to Question 1

C

Answer to Question 2

E

[joblessjake]

Excellent

[Kedrick2014]

Gracias!