By mixing all the colours of the visible spectrum of sunlight, we produce:

A. Purple light
B. White light 
C. Black light
D. Green light

🧠 Explanation:

Mixing all colors of the visible spectrum of sunlight produces white light, a principle of optics. This phenomenon is a key topic in physics, engaging students and scientists. Understanding light’s properties clarifies color perception, relevant for optics and visual arts. The creation of white light attracts those studying light behavior and its applications in technology, like displays or photography, emphasizing its role in scientific and creative fields for understanding vision and illumination.