A wall is first coated with a matte paint that leaves an rms surface variation of
PHYSICS · Subjective · CBSE · Physics · The Human Eye and the Colourful World · The Human Eye and the Colourful World
Problem
A wall is first coated with a matte paint that leaves an rms surface variation of 2μm. After drying, a glossy overcoat reduces the rms surface variation to 0.02μm. When illuminated by a broad white spotlight, which finish appears brighter to an observer located 60∘ away from the incident direction, and why?