| The diagram below shows how a green leaf would look under red light, blue light and green light. |
|
| Select the correct inference drawn from this. |
A)
Coloured light
Absorbed by the leaf
Reflected by the leaf
Used by the leaf for photosynthesis
Red light
B)
Coloured light
Absorbed by the leaf
Reflected by the leaf
Used by the leaf for photosynthesis
Blue light
C)
Coloured light
Absorbed by the leaf
Reflected by the leaf
Used by the leaf for photosynthesis
Red and blue light
D)
Coloured light
Absorbed by the leaf
Reflected by the leaf
Used by the leaf for photosynthesis
Green light
Correct Answer: C
Solution :
The coloured objects that we see around us are due to the reflection of those colours by these objects e.g., leaf appears green due to reflection of green light by it. Leaf appears black under red and blue light because both these colours get absorbed by the leaf. Also, red and blue light are the most efficient lights for photosynthesis and thus, they are used up by the leaves for this process, green light is not used up in the photosynthesis.
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