As light travels from vacuum (n = 1) to a medium such as glass (n ...

[ETearle]

As light travels from vacuum (n = 1) to a medium such as glass (n > 1), which of the following properties remains the same?
 
   (a) wavelength
   (b) wave speed
   (c) frequency

  1.(a)
  2.(b)
  3.(c)
  4.(b) and (c)
  5.None, all change.

Question 2

A material has an index of refraction that increases continuously from top to bottom. Of the three paths shown in the figure, which path will a light ray follow as it passes through the material?
 

[Jadwiga9]

Answer to Question 1

3

Answer to Question 2

[ETearle]

Thank you!

[Jadwiga9]

Always glad to help...