Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...
Editor's Notes
The images we see are made up of light reflected from the objects we look at.
Whether direct or indirect, natural or artificial, it is the scattering of visible light that enters our eyes so that we can see.
We only see the visible light that enters our eyes. Other animals see a wider or different light spectrum. Bees can see ultraviolet light, snakes can see infrared light.
We also see colors differently than other animals. Lets look more closely at the human eye.
The iris is like a shutter of a camera, determining how much light to let in. The iris contracts to let more light through the pupil when conditions are darker. The lens in a human eye and a camera do the same thing! Focus light to create an image in the back of the eye on the retina. The cornea is like your camera’s cap, it protects the eye. The optic nerve sends the optic message back to the brain, but check out the image as it would look on the retina in the next slide.
The image in the back of the eye is upside down! This happens in both our eyes and in cameras! It is due to the way light reflects off objects.
This slide sums it all up. Pretty cool!
By making a camera obscura we get a pretty good idea of how the eye and light waves entering the eye work.
If you get a chance to experiment with the size of your pinhole, look for image quality versus color. A smaller hole allows only a small amount of reflected light into the box, so the image is clear. When you enlarge the hole it allows more light in, giving your picture better color, but a blurry image. Why is this?
