Light: Visible Light

The video tutorial explains the visible spectrum, a narrow range of light wavelengths we can see, consisting of colors like red, orange, yellow, green, blue, indigo, and violet. It describes how white light from the sun contains all these colors mixed together. Rainbows are formed when sunlight is separated by raindrops, demonstrating the visible spectrum. The video also covers refraction, the bending of light due to speed changes, and dispersion, where different wavelengths are refracted by different amounts, separating colors. A prism is used to illustrate how light is refracted and dispersed.

What is the visible spectrum?

• The range of sound frequencies humans can hear

• The spectrum of ultraviolet light

• The entire electromagnetic spectrum

• The range of light wavelengths that humans can see

Which colors are part of the visible spectrum?

• Orange, pink, brown, gray, black

• Red, orange, yellow, green, blue, indigo, violet

• Red, green, blue, ultraviolet, infrared

• Yellow, cyan, magenta, black, white

How is a rainbow formed?

• By the reflection of light off a mirror

• By the separation of white light through raindrops

• By the absorption of light by clouds

• By the scattering of light by dust particles

What is refraction?

• The bending of light due to a change in speed

• The reflection of light off a surface

• The absorption of light by a material

• The emission of light from a source

What happens when light passes through a prism?

• It slows down and separates into different colors

• It speeds up and combines into a single color

• It becomes invisible

• It reflects back in the same direction