Answer:
It moves along straight lines in air and changes direction when it enters water.
Explanation:
When light travels from one medium to another, it undergoes a phenomenon called refraction: the ray of light changes speed and also direction, but it continues to move in a straight line.
There is a relationship between the direction of the incident ray and the direction of the refracted ray: (Snell's Law)
[tex]n_1 sin \theta_1 = n_2 sin \theta_2[/tex]
where
n1 is the index of refraction of the first medium
[tex]\theta_1[/tex] is the angle that the incident ray forms with the normal to the surface
n2 is the index of refraction of the second medium
[tex]\theta_2[/tex] is the angle that the refracted ray forms with the normal to the surface
Answer:
A: It moves along straight lines in air and changes direction when it enters water.
Explanation:
