When sunlight reaches a surface?
Then the light hits a surface, possibly a building, a landscape, or a face. What happens next is dependent on the texture, tone, and color of the material, as well as the angle and color of the light itself.
What is a picture of opaque?
If the material is opaque to light – metal or brick for instance – a portion of the light is reflected and a portion is absorbed.
The darker the matter, the smaller the proportion of reflection. Therefore, a black housing left in the sun warms up more than a shiny silver housing.
If the material is also colored, it mirrors the wavelengths of that color and absorbs most of the other wavelengths present in the light. For example, blue paint is reflective of blue and absorbs red and green from white light. But if your light already runs out of wavelength, it will change the appearance of the subject. To take an extreme case, when illuminated by a deep red light, a rich blue will look and photograph nearly black.
You must be familiar with these effects to be able to use color filters. Color modification can also be done at a later stage, if you scan the negative and digital printing, then the work can be done using various postproduction software. The surface finish also has a large influence on the way the light is reflected.
A matte surface like an eggshell, drawing paper, or dry skin disperses light uniformly. The angle at which the light hits does not make much difference. However, if the surface is smooth and shiny like crystal or glossy paint, it acts more like a mirror,
It reflects most of the light in one direction. This is referred to as speculative thinking. If your light hits the bright surface at a right angle, it will reflect along its original trajectory. You get a dazzling spot, for instance, when the flash shots on the camera are taken flat on a glass window or glossy painted wall. But when the light is inclined, it is reflected on such surfaces at the angle from which it came.