light, the eye, and the EM spectrum Flashcards
the current and most popular theory on light is that it is _____
both waves and particles
the units for measuring frequency are ___
hertz
the units for measuring wavelength are ____
meters
what is the speed of light?
300,000,000 m/s
what happens to light when it enters a denser medium?
it slows down
facts about white light
- it is composed of all colors of light
- it can be broken into the full spectrum
when you shine a light on a black object, the reflected color appears darker than the incident light because the darker object _____ the light
absorbs
the EM spectrum
radio waves, microwaves, infrared, UV radiation, x-rays , gamma rays
visible light portion of the EM spectrum
red, orange, yellow, green, blue, violet
difference between red and blue light
- red light has low energy and a low frequency, longer wavelength
- blue light has high energy and a high frequency, shorter wavelength
how did newton determine that white light was a combination of all colors?
he recombined all the colors using a second prism to produce white light
difference between the addition of light and the subtraction of color & examples
addition of light: adding colors to make white light
ex. red and green make yellow
subtraction of color: when colors are subtracted from white to produce the individual color
ex. paint
what parts of the eye are located in the retina?
rods/cones
when an object appears to be yellow, what color is it absorbing?
blue
similarities between the ear and the eye
- have nerves
- have 3 main parts
- send messages to the brain
