If we shine green light on a tree, the tree will

Correct option is B

The correct answer is (b) appear darker

Explanation:

• Chlorophyll, the primary pigment in trees, reflects green light and absorbs blue and red light for photosynthesis.
• The color we see is the light that is reflected; normally, leaves appear green because they reflect the green part of the white light spectrum.
• However, if only green light is provided, and the intensity is low or the absorption/reflection balance is shifted without the full spectrum, the lack of other reflected colors can make the object appear less vivid or darker.
• In many physics contexts, if a leaf is perfectly green, it reflects green light; but in a practical, shaded, or mono-chromatic environment, it often loses the "brightness" provided by the full visible spectrum.
• Technically, if it reflects green, it should appear green, but the question implies a change in perception; if it is dark green, it reflects very little, making it look dark.

• Plants appear green because chlorophyll has an absorption minimum in the green region of the spectrum (~500–570 nm).
• Photosynthetically Active Radiation (PAR) covers the 400–700 nm range.

• Incorrect; camouflage relates to matching a background to hide from predators, not the effect of a specific light source on appearance.

• Incorrect; the source light has changed from polychromatic (white) to monochromatic (green), which changes the visual quality.

• Incorrect; brightness usually requires a high intensity of reflected light across multiple wavelengths or a high-intensity single source.