Question
Physics Question on Wave optics
A leaf which contains only green pigments, is illuminated by a laser light of wavelength 0.6328 mm. It would appear to be
A
brown
B
black
C
red
D
green
Answer
black
Explanation
Solution
If an object reflects the colour of light incident on it, it will appear with that colour but if object absorbs the colour of light, it will appear to be back. Since the given wavelength does not belong to green, so it will be absorbed by the leaf and hence, it will appear to be black.