If a green electric bulb is installed in a room, the red cloth will appear black colored. This is because green light is absorbed by the red cloth, which reflects only red wavelengths. Since green light is absent, the cloth ...
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The color of light is determined by its wavelength. Wavelength corresponds to the distance between successive peaks or troughs of a wave and determines the color perceived by the human eye. Different wavelengths of light correspond to different colors in ...
When red, green, and blue colors of light are mixed in equal proportions, the resulting color will be white. This additive color mixing principle is used in devices like computer monitors and televisions to produce a full range of colors ...
Dry sand appears bright because it reflects more light, while wet sand appears darker because water fills the gaps between sand grains, reducing the reflection and causing more light to be absorbed or refracted within the sand-water mixture, making it ...
If the power of the lens of an eyeglass is +2 diopters, its focal length will be 50 cm. The focal length of a lens in meters is the reciprocal of its power in diopters.