- #1
mba444
- 54
- 0
Homework Statement
A light ray enters the atmosphere of a
planet where it descends to the surface
15.2 km below. The index of refraction where
the light enters the atmosphere is 1.2 and it
increases uniformly to the surface where it has
a value of 1.55.
I) How long does it take the ray to traverse this path? Answer in units of s.
II) How long would it take to cover the same distance in a vacuum? Answer in units of s.
Homework Equations
speed of light= 2.99*10^8
delta V = C/(delta N)
delta V= delta X / delta t
The Attempt at a Solution
For Question I what i did is that
delta N = N2-N1= 1.55-1.2= 0.35
delta V = (2.99*10^8)/(0.35) = 8.54*10^8 m/s
delta t = 15.2*10^3/8.54*10^8= 1.779*10^-5sec
but I am not sure if my way is correct can someone please check and tell me if I am going wrong somewhere
and for II) i didnt understand what is needed therefore i didnt know how to attempt at a solution
need your help and thanks in advance