Human Sight
Visible light and the eye's response: Physics online Classroom
(Anatomy books provided in class)
Although there are various colors of eyes, all have one thing in common: the pupils are black. This is because the light that enters the eyes through the pupils is absorbed. (Extra: in flash photography sometimes photos show people with red eyes because the bright flash is reflected fro the retina of the eye when the eye doesn't have time to adjust to the bright light) Usually the pupil is such a good absorber of radiant energy that there is no reflection and the pupil appears black.
You should know what frequencies our eyes usually see in (state the range of visible light)
Know the order of visible light frequencies from lowest energy (lowest frequency) to highest energy (highest frequency) the order can be memorized by ROYGBIV standing for Red, Orange, Yellow, Green, Blue, Indigo, Violet
The lower the frequency the longer the wavelength so Red has the longest wavelength out of visible light.
So from this information what color do you think would be on the outside of the rainbow and what color would be on the inside? Answer: Red is on the outside since it is the longest wavelength and has more distance to travel than the rest of the colors and contrary to that violet is the innermost color in a rainbow.
Most (80%) people are right-eyed dominant. Eye dominance test: Which eye do you use more? to test, hold a finger at arm's length. with both eyes open, look past your finger to a distant object. close your right eye. does your finger jump to the right? if so, then you use your right eye more.
the color of an object is due to the light frequencies reflected from objects (if opaque aka "solid") or transmitted through objects (if transparent). for instance a red piece of glass appears red because it absorbs all the colors that compose white light, except red, which it transmits.
why is the sky blue?
why are sunsets red? (look in book or google if you have to.
when sunlight travels a long path through the atmosphere, as at dawn or sunset, only the lower frequencies of light are transmitted; the higher ones are scattered out.
why are some of us nearsighted aka myopic? (learn about light refraction and light focusing in front or in back of the retina) Contact lenses or glasses correct that refraction and make light focus on the retina. As you grow older you start to become more far sighted
how do sunglasses work (involves polarization)
how do 3-d glasses work? (involves polarization)
are black and white real colors, in the sense that red and green are?
Visible light and the eye's response: Physics online Classroom
(Anatomy books provided in class)
Although there are various colors of eyes, all have one thing in common: the pupils are black. This is because the light that enters the eyes through the pupils is absorbed. (Extra: in flash photography sometimes photos show people with red eyes because the bright flash is reflected fro the retina of the eye when the eye doesn't have time to adjust to the bright light) Usually the pupil is such a good absorber of radiant energy that there is no reflection and the pupil appears black.
You should know what frequencies our eyes usually see in (state the range of visible light)
Know the order of visible light frequencies from lowest energy (lowest frequency) to highest energy (highest frequency) the order can be memorized by ROYGBIV standing for Red, Orange, Yellow, Green, Blue, Indigo, Violet
The lower the frequency the longer the wavelength so Red has the longest wavelength out of visible light.
So from this information what color do you think would be on the outside of the rainbow and what color would be on the inside? Answer: Red is on the outside since it is the longest wavelength and has more distance to travel than the rest of the colors and contrary to that violet is the innermost color in a rainbow.
Most (80%) people are right-eyed dominant. Eye dominance test: Which eye do you use more? to test, hold a finger at arm's length. with both eyes open, look past your finger to a distant object. close your right eye. does your finger jump to the right? if so, then you use your right eye more.
the color of an object is due to the light frequencies reflected from objects (if opaque aka "solid") or transmitted through objects (if transparent). for instance a red piece of glass appears red because it absorbs all the colors that compose white light, except red, which it transmits.
why is the sky blue?
why are sunsets red? (look in book or google if you have to.
when sunlight travels a long path through the atmosphere, as at dawn or sunset, only the lower frequencies of light are transmitted; the higher ones are scattered out.
why are some of us nearsighted aka myopic? (learn about light refraction and light focusing in front or in back of the retina) Contact lenses or glasses correct that refraction and make light focus on the retina. As you grow older you start to become more far sighted
how do sunglasses work (involves polarization)
how do 3-d glasses work? (involves polarization)
are black and white real colors, in the sense that red and green are?