A green leaf placed in a dark room is illuminated by red light. The leaf will appear to be :

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

Green

Red

Yellow

Black

answer is D.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

Concept: VIBGYOR, Out of these seven colors of light, violet has the shortest wavelength and red has the longest wavelength. Whenever a ray of light falls on a substance, then either it reflects the light or absorbs the light. It is known that this light has seven colors.
The color which is reflected by the substance appears to be its color to a human eye. All other colors are absorbed by the substance and are not visible to the eye.
It is given that the leaf has a green color, therefore it will reflect only green light and absorb the rest of the colors. But when the red light is made to fall on the leaf, then the leaf will absorb the red light. Therefore, no light will be reflected and the leaf will appear black.
Hence, the correct option is 4

Watch 3-min video & get full concept clarity