The speed of light in a material is 0.50c. What is the critical ...

[ahriuashd]

The speed of light in a material is 0.50c. What is the critical angle of a light ray at the interface between the material and a vacuum?
 
  A) 30
  B) 21
  C) 24
  D) 27

Question 2

The position x, in meters, of an object is given by the equation x = A + Bt + Ct2, where t represents time in seconds. What are the SI units of A, B, and C?
 
  A) m, s, s2
  B) m, m/s, m/s2
  C) m, s, s
  D) m/s, m/s2, m/s3
  E) m, m, m

[Brenm]

Answer to Question 1

A

Answer to Question 2

E

[ahriuashd]

Great answer, keep it coming

[Bigfoot1984]

TYSM