Question

Out of the 56% of sunlight reaching the earth's atmosphere, ............... is used for photosynthesis.

• A. 0.05%
• B. 0.02%
• C. 10%
• D. 0.2%

Hint:

Despite the vast amount of solar energy reaching Earth, only a tiny portion is used for photosynthesis, powering life on the planet.

Answer 1

The Correct Option is B

Step 1: Understanding sunlight utilization.
Only a small fraction of the sunlight that reaches the Earth's atmosphere is actually used for photosynthesis. This energy is absorbed by plants and used to convert carbon dioxide and water into glucose and oxygen.
Step 2: Analyzing the options.
(A) 0.05%: Incorrect, this value is slightly higher than the actual percentage used in photosynthesis.
(B) 0.02%: Correct, only about 0.02% of the total solar energy reaching the Earth is used by plants for photosynthesis.
(C) 10%: Incorrect, this is far too high compared to the actual amount used for photosynthesis.
(D) 0.2%: Incorrect, while this is closer, it is still higher than the actual percentage.
Step 3: Conclusion.
The correct answer is (B) 0.02%, as only this small fraction of sunlight is utilized for photosynthesis.