Answer:

Explanation:
The electric field is defined as the electric force per unit of charge, this is:
.
The electric force can be obtained through Coulomb's law, which states that the electric force between to electrically charged particles is inversely proportional to the square of the distance between them and directly proportional to the product of their charges. The electric force can be expressed as
.
By substitution we get that

Now, letting
be the electric field at point A, letting
be the electric field at point B, and letting R be the distance from the charge to A:
.
The ration of the electric fields is

This means that at half the distance, the electric field is four times stronger.
The streets are illuminated with sodium vapor lights. hope this helps!!!!!!
Answer:
When the waves reflected from the inner and outer surface combine they will interfere with each other, removing or reinforcing some parts of white light by destructive or constructive interference. ... This results in color.
Explanation:
this is what we studied
so basically there is like a surface
and 2 different waves coming out of the same source
they will combine and start removing parts of the white light (which originally consists of 6 to 7 colors)
results in showing these colors
0.6 is the answer
Hope this helped