Vision. when light having vibrations with angular frequency ranging from 2.7×1015rad/s to 4.7×1015rad/s strikes the retina of the eye, it stimulates the receptor cells there and is perceived as visible light.

what are the limits of the frequency of this light?

Explanation:

Given

angular frequency ranging From

we know

where

for

for

Frequency ranges from            

answer: good job it's all correct !

explanation:

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