What are backlight and backlight? Explain it in a popular way.

Backlight is also called backlight. Backlight: refers to the light that illuminates the back of the object being photographed. Backlight is used to darken the front of the subject in the direction of the camera, and the outline is clear and obvious when shooting people. Therefore, full backlight is also called profile light or profile light. Semi-backlight, called Rembrandt light, is a strong light used to depict characters' personalities. You must use a hood when shooting against the light to prevent the light from entering the lens directly. Backlight shooting characteristics: the light is opposite to the shooting direction, which can outline the brightness outline of the subject, also known as side light. The scenery under the backlight has distinct layers, prominent lines and vivid pictures, and the photos taken have a strong sense of three-dimensional and space. Therefore, backlight is most suitable for dark scenes under dark background and is an ideal light. We often use it to capture silhouettes, and the effect is good.