Discuss Exposure

this image is over exposed which has let in too much light. This could be improved by adjusting your shutter speed to a quicker speed.

 this images exposure is just right and has let in the right amount of light.

this image is under exposed and hasn't let in enough light. This can be improved by slowing down the shutter speed.

Exposure is used wehen taking an image, the exposure is determined by your length of shutter speed, the longer the shuter speed the more light let in and the shorter the shutter speed the less light you let in.