JAMB - Physics (2024 - No. 106)
What is the colour of red rose under a blue light?
Green
Blue
Yellow
Black
Paliwanag
Under blue light, a red rose will appear black or very dark. This is because the red pigments in the rose reflect red light and absorb other colors. Since blue light does not contain red wavelengths, no light is reflected back to the observer, causing the rose to appear dark.