Physics- Light and Color

a combination of all colors would make what?

white light

according to the duality principle, light is what?

a wave when it acts like a wave; a particle when it acts like a particle

by the 17th century, what 3 things had been observed about light?

travel in straight lines, refract, reflect

define opaque

doesn’t transmit light

define photoelectric effect

emissions of electrons from a material.

define translucent

allows some light to pass through, but cant see clearly

define transparent

all light passes through

define visible light

portion of electromagnetic spectrum the human eye can see

Frequencies above white or visible light are called?

ultraviolet

frequencies below white or visible light is called?

infrared

how fast does light travel?

186,000 miles per second

humans are most sensitive to what color light?

yellow-green

list the 3 primary colors of light

red, green, blue

red and green light make what color light?

yellow

the absence of all color is called what?

black

the spread of all colors is called what?

spectrum

the wave theory of light said what?

light was a wave

what 2 scientists came up with the particle theory of light?

Isaac Newton & Pierre Laplace

what two scientist came up with the wave theory of light?

Christian Huygens & Robert Hooke

what 2 scientists proposed that light was a type of electromagnetic wave? who confirmed it?

James Maxwell & Micheal Faraday. Heinrich Hertz confirmed it.

what color light makes up magenta? cyan?

magenta- red & blue

cyan- green & blue

what colors of light does black absorb? reflect?

all visible colors; reflects none

what colors of light does white absorb? reflect?

absorb none; reflect all

what did the particle theory state?

light was made up of particles.

what is a complimentary color?

when added to a primary color, it will produce white

what is the brightest part of the sunlight?

yellow-green

what was required for the particle theory of light to be correct?

light moves faster in water than in air

what was required for the wave theory of light to be correct?

light moves slower in water than in air.

which theory of light was the most popular one and why?

Particle theory because Isaac Newton had a good reputation

white light is composed of what?

all colors

who discovered that light traveled faster in air than in water?

Jean Foucault

who proposed the quantum theory?

Max Planck & Albert Einstein

who was the first person to study color?

Isaac Newton

yellow and blue light make up what color light?

white light