The speed of light in a material is given by:
where
is the speed of light in vacuum
n is the refractive index of the material
The lens in this problem has a refractive index of n=1.50, therefore the speed of light in the lens is
And the correct answer is C).
A car speeding down a 20 foot hill
It's further away from the star
False
It can <u>NOT</u> because light will just bounce back and there will need to be an item transparent and due to the fact that aluminum foil is not transparent it will be then <u>FALSE</u>