When waves enter a denser medium, they bend the normal. a) toward b) away from

Option (A)

Explanation:

When a ray of light passes through one optical medium to another optical medium it deviates from its path. This phenomenon is called refraction.

The speed of light in different medium is different.

As light ray travel from rarer medium to denser medium the speed of light decreases.

Thus, it have to cover minimum path length and hence moves towards the normal.

b.

hope this : )

the word that best describes martin luther king jr.'s tone in the video is dignified

martin luther king, jr. was a social activist and baptist minister who played a key role in the american civil rights movement from the mid-1950s until his assassination in 1968. the video shows his manner and attitude having or showing a composed or serious manner that is worthy of respect so dignified is the correct answer