A thin laser beam traveling in air strikes the surface of a glass ...

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A thin laser beam traveling in air strikes the surface of a glass plate at 41.2 with the normal. In the plate, this beam makes an angle of 22.4 with the normal. What is the speed of light in this glass?(c = 3.0  108 m/s)
 
  What will be an ideal response?

Question 2

The water flowing over Niagara Falls drops a distance of 50 m.
 
  If all the gravitational potential energy of the system water-Earth is converted to thermal energy, by what temperature does the water rise? The specific heat of water is 4186 J/kg  K. A) 0.10 C
  B) 0.12 C
  C) 0.37 C
  D) 0.42 C

[ansleighelindsey]

Answer to Question 1

1.74  108 m/s

Answer to Question 2

B

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