What are the functions of light in photography?

First, meet the basic technical requirements of lighting.

Light is the prerequisite for obtaining photographic images, and it is also the need for accurate exposure of film or tape. Photography is an art closely related to light. No matter the process of technology or artistic creation, it is inseparable from light. This is a striking feature that distinguishes photography from other arts. It meets the requirements of lighting in film technology, and it is a basic requirement, foundation and most basic task of photographic art creation.

Second, the structure and color of the performance object

In nature, the external shape, surface structure, surface color and texture of different objects are different. Due to the reflection of light, people can see the external shape, structure, color and texture of objects. The surface structure, absorption, projection and reflection of light are different. Transparent body or translucent body transmits more light, light objects reflect more light, dark objects reflect less light, and objects with smooth surfaces reflect hard light with obvious directionality; The light reflected by an object with a rough surface is not directional, soft and diffuse. The light reflected by semi-rough surface objects has dual characteristics of directional reflection and diffuse reflection.

Third, express the spatial position of objects.

Objects in nature have three dimensions: length, width and height. However, photography displays objects on a two-dimensional screen. Therefore, in order to express the depth of the object, we must use the relationship between light and shade to express the three-dimensional shape and spatial perspective effect of the object through plane photography.

Fourth, reproduce its concept of environment and time.

The real and rich environmental atmosphere can set off the characters and show the breath of life. At the same time, the environmental atmosphere can fit the audience's psychology and express the character, occupation and hobbies. The performance of ambient air and the application of specific lighting effects can also give the audience a strong sense of time. For example, the same scene is shot with sunlight in different time states (morning, noon, evening, etc.). ), and artificial lighting can also consider simulating and reproducing the time variation of its specific light to increase the persuasiveness of visual language education. The works outlined by different natural light can make people feel immersive when watching these works.