Beams of red and green light are sent on the same site of the screen(diffraction phenomenon). Now the screen will appear (Ans : Yellow )

Beams of red and green light are sent on the same site of the screen(diffraction phenomenon). Now the screen will appear 
(Ans : Yellow )


2 Answers

askIITians Faculty 69 Points
9 years ago
Additive (Light) Color Primaries

Red, green, and blue are the primary colors of light—they can be combined in different proportions to make all other colors. For example, red light and green light added together are seen as yellow light.This additive color system is used by light sources, such as televisions and computer monitors, to create a wide range of colors. When different proportions of red, green, and blue light enter your eye, your brain is able to interpret the different combinations as different colors.

Additive (Light) Cheat Sheet

Color is transmitted through transparent media.
All colors added together = white.
The absence of light = true black.
Because computer graphics, websites, and other digital presentations are projected/transmitted with light, screen-targeted graphics should be saved in this color model, or “RGB Mode.”
IMPORTANT: Note that when RGB’s primaries are mixed evenly that they create the secondary colors of our next color model, CMY (cyan, magenta, and yellow)!

Subtractive (Pigment) Color Primaries

However, there is another set of primary colors with which you may be more familiar. The primary colors of pigment (also known as subtractive primaries) are used when producing colors from reflected light; for example, when mixing paint or using a color printer.The primary colors of pigment are magenta, yellow, and cyan (commonly simplified as red, yellow, and blue).

Pigments are chemicals that absorb selective wavelengths—they prevent certain wavelengths of light from being transmitted or reflected.Because paints contain pigments, when white light (which is composed of red, green, and blue light) shines on colored paint, only some of the wavelengths of light are reflected.For example, cyan paint absorbs red light but reflects blue and green light; yellow paint absorbs blue light but reflects red and green light. If cyan paint is mixed with yellow paint, you see green paint because both red and blue light are absorbed and only green light is reflected.
40 Points
9 years ago
Please explain with reference to diffraction.

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