Why does a red bus look red in the day light?

A red bus looks red in daylight because of the way light interacts with the surface of the bus. When light from the sun hits the bus, it contains all the colors of the visible spectrum: red, orange, yellow, green, blue, indigo, and violet.

However, the surface of the bus is designed to absorb most of the colors in the spectrum and reflect only the color red. This is because the surface of the bus contains pigments or dyes that selectively absorb certain wavelengths of light. In the case of a red bus, the pigments or dyes in the paint are specifically designed to absorb all colors except for red, which is reflected back to our eyes.

When the red light is reflected off the bus and enters our eyes, the cells in our retina called cones are stimulated by the specific wavelength of red light. These cones send signals to our brain, which interprets the signals as the color red. Therefore, we perceive the bus as red in daylight.