aperture

Aperture:

what is aperture?
        aperture is how much light comes into the lens so if you have a f stop at 22 that means the lens is opened really small and that will make it a good landscape photo due to it has everything in focus. with a fully opened lens say a f2.8 that will help you if your taking a photo of one person or thing and you want to blur out the background.

How aperture works technically (in camera) & visually (in photo):
         If you have a lower f stop that means if your focused on one thing or even a person everything behind it will be blurry and if you have a higher f stop so a f22 everything in your photo will be in focus nothing will be blurry.

what happens to the exposure triangle when you change your aperture:
        you change the shutter to even out your light meter. and If you have a power f stop so a f2.8 you will have a fast shutter speed, but when you have a higher f stop so a f22 it will have a slow shutter.