Consider the following statements : 1. The Earth receives the Suns energy at the infrared end of the spectrum. 2. The Earth re-radiates the Suns heat as ultraviolet energy. Which of the above statements is/are correct ?

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Q: 85 (CAPF/2009)
Consider the following statements :
1. The Earth receives the Suns energy at the infrared end of the spectrum.
2. The Earth re-radiates the Suns heat as ultraviolet energy.
Which of the above statements is/are correct ?

question_subject: 

Geography

question_exam: 

CAPF

stats: 

0,40,30,12,0,18,40

keywords: 

{'ultraviolet energy': [0, 0, 1, 1], 'suns energy': [0, 0, 1, 0], 'suns heat': [0, 0, 1, 0], 'infrared end': [0, 0, 1, 1], 'spectrum': [0, 0, 1, 1], 'earth': [0, 1, 1, 1]}

The correct answer is option 4, which states that neither statement 1 nor statement 2 is correct.

To understand why, let`s dissect each statement:

Statement 1: The Earth receives the Sun`s energy at the infrared end of the spectrum.

This statement is incorrect. The Sun primarily emits its energy in the form of visible light and a small portion of ultraviolet (UV) light. Infrared radiation is a form of electromagnetic radiation with longer wavelengths than visible light and it is not the primary form of energy emitted by the Sun. Therefore, the Earth does not receive the Sun`s energy primarily in the infrared end of the spectrum.

Statement 2: The Earth re-radiates the Sun`s heat as ultraviolet energy.

This statement is also incorrect. The Earth absorbs the Sun`s energy primarily as visible light and a small portion of UV light. The Earth then re-radiates the absorbed energy back into space, but mostly as infrared radiation (heat) due to its lower temperature compared to the Sun. Ultraviolet energy is not the primary form of energy re-radiated by the Earth.

In conclusion, neither statement 1 nor statement 2 is correct.

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