✔ 最佳答案
let's first divulge in the meaning of 'photography'
photo means light
graph means to draw
so basically, "to draw with light"
if there isn't any light, you can't draw, right?
Cameras need light. Period. If there is less light, such as during a night shot, the camera will increase the sensitivity, causing the noise that you see. Along with that, you will use slower shutter speeds which will increase chance of blur.