Color of Lights, Questions and Answers

The answer to this question is that the picture taken with the telephoto lens has a very weak impression on the depth. Therefore, the depth impression of a lens with a longer focal length is weaker. What else has changed? Since many objects are displayed in a picture taken with a short shot, the longer the focal length of the lens, the larger the background object. How to color a picture. As the sun goes forward, the intensity of the light changes and the way the color looks changes.

Unfortunately, your question can not be answered simply. Writing has a great influence on the color of the material, but without the detailed knowledge of the material's properties and lighting, they are not necessarily predictable. For example, with a change from daylight to incandescent light, one blue paint may still be blue and the other paint may turn purple. There are also large variations in the lighting of a given type (ie different stages of sunlight, different types of fluorescent lights, etc). In other words, color science can predict changes that can be seen only if specific materials and information sources are clearly defined or measured. (Back to top)

This question can be answered at various levels. At the most basic level, the color is human perception and perception comes from the reaction of three conical photoreceptors in our eyes. Because these photoreceptors respond to light of different wavelengths, it is this light that produces color perception. Why are there three types of cones? These reactions to energy wavelength (light) are the physiological functions of human cells, the content of information in scenes and objects, and the problems that they evolve and interact with light. (Back to top)

The first question is, "Why do we see the color we see?" In order to answer this question purely physically it is important to understand the function of the eye. In our opinion, we have light-sensitive cone cells of different wavelengths. These conical cells, called S-shaped cones, M-shaped cones, and L-shaped cones, are used for light at wavelengths of 420 to 440 nm (blue), 534 to 545 nm (green), and 564 to 580 nm (red) It is sensitive. . By combining the relative signals from these three cones, our brain can see a fairly continuous range of colors (in reality there are 10 million colors!). So we will see the color we see because our eyes are just different frequencies / wavelengths of the light that we specifically adjust

This is a classic question, and many elementary school science projects have been trying to answer this question for years. The answer relates to understanding rainbow (or complete visible spectrum) and plant leaf color. The leaves are green because they reflect green while absorbing all other colors of light. Think about rainbows, what color other than green do you have? Well, one end of the spectrum is red, the other end is blue or purple. The rainbow represents all colors that the sun emanates and passes through the Earth 's atmosphere. What we think about white light is actually a mixture of all colors in the rainbow. Therefore, all these colors are illuminated by plant leaves and absorb all colors except green. In general, plants absorb mainly red (or red / orange) and blue light.