What part of the electromagnetic spectrum can be seen by humans?

Visible light

Explanation:

Electromagnetic spectrum is the classification of the electromagnetic waves based on their frequency and wavelength. In order from the shortest to the longest wavelength, we have

Gamma rays

X-rays

Ultraviolet

Visible light

Infrared radiation

Microwaves

Radio waves

All these waves are invisible to human eye, except for the visible light part. Visible light is perceived as a different color by the human eye, depending on the wavelength of the light. In particular, we have:

Violet: 380 - 450 nm

Blue: 450 - 495 nm

Green: 495 - 570 nm

Yellow: 570 nm - 590 nm

Orange: 590 nm - 620 nm

Red: 620 nm - 750 nm

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

i'm on my way to history not a mistory.