Question

Due to which phenomena the combination of red, green and blue forms the same white colour

• A. Due to persistence of vision
• B. Due to reflection
• C. Due to refraction
• D. Due to deviation

Answer 1

The correct option is A Due to persistence of vision

The above question can be understood by Newton Disc experiment.

The Newton disc, also known as the Disappearing Colour Disc, is a well-known physics experiment with a rotating disc with segments in different colors (usually Newton's primary colors: red, orange, yellow, green, blue, indigo, and violet or VIBGYOR) appearing as white (or off-white or gray) when it spins very fast.

The reason of white color appearance on spinning is persistence of vision.

Persistence of vision traditionally refers to the optical illusion that occurs when visual perception of an object does not cease for some time after the rays of light proceeding from it have ceased to enter the eye.

Due to this when a new color reaches our eyes previous color is still felt by our eyes and previous colors and succeeding colors combined together to form white color hence the rotating disc appears white because due to persistence of vision all colors are felt by our eyes at same time and combined together they appear white .