A long Exposure photography means capturing any photo for a long time. You all might be saying what am I trying to say, is this person mad or what? Look, A picture is developed by the sensor when it collects all the data, structure, light from the lens. The colour we see in an Image is the byproduct of colours reflecting to sensor by lens. The below Image will be used to demonstrate the things. That is how things works.
The Camera and Lens Capture the image and make sure that it goes to Sensor. The sensor collects the Data in an inverted format. The multiple Camera brand have different quality of sensor but every sensor work similarly.
In high School we have learnt about the Pin Hole light effect, where an object (light source) is placed in front of a small hole (Pin Hole), we see an inverted image. In similar manner camera Sensor captures image.
Do you know that capturing any image is all about 3 main aspect of camera. That is known as an Exposure Triangle.
I – ISO
S – SHUTTER
A – APERTURE
to know more about exposure triangle in Photography click here
Long-exposure photography can be done in daylight as well as at night. It is more easy to do long exposure in low light or night, but it starts getting difficult while doing it in Daylight.