Given reason :Only a fraction of sunlight is used for photosynthesis.

1.	Given reason :Only a fraction of sunlight is used for photosynthesis.
Answer» 1. When sunlight falls on the earth surface about 34% of this is reflected back. 2. About 10% is held by the ozone layer, water vapour and other atmospheric gases. 3. Out of the total solar energy, about 56% reaches to the earth’s atmosphere. 4. Only 0.02% of the sunlight is used for photosynthesis. This shows that only a fraction of sunlight is used for photosynthesis.

Answer»

1. When sunlight falls on the earth surface about 34% of this is reflected back.

2. About 10% is held by the ozone layer, water vapour and other atmospheric gases.

3. Out of the total solar energy, about 56% reaches to the earth’s atmosphere.

4. Only 0.02% of the sunlight is used for photosynthesis. This shows that only a fraction of sunlight is used for photosynthesis.

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