alessandra

2. The speed of light in a certain plastic is 1.88*10^8 m/s. what is the index of refraction of plastic?

8. a light beam enters a piece of window glass (n=1.47) at an incidence angle of 59. Find the angle it makes to the normal as it exists from the other side of the flat window glass. What general rule can you conclude?

can you please change these to radical form without simplifying them? 625^(3/4) 4x^(-1/2) 32y^(-2/5) x^(1/3) - y^(1/3)

magnitude : square root of ( (-2)^2 + 5^2 ) = (4 + 25) = sqrt 29 = 5.38516 angle = 180 + tan^-1(5/-2) = 179.9 = 180 degrees.

wait i don't think that's right