Question

Match List-I with List-II
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• A. (A)-(IV), (B)-(I), (C)-(III), (D)-(II)
• B. (A)-(IV), (B)-(III), (C)-(II), (D)-(I)
• C. (A)-(IV), (B)-(III), (C)-(I), (D)-(II)
• D. (A)-(IV), (B)-(I), (C)-(II), (D)-(III)

Hint:

To distinguish between radiometers:
- Pyranometer measures shortwave solar radiation.
- Pyrgeometer measures longwave infrared radiation.
- Pyradiometer measures total radiation (both shortwave and longwave).

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Agricultural meteorology and crop physics utilize specialized instruments to measure different components of solar and terrestrial radiation, as well as light properties.

Step 3: Detailed Explanation:
Let us match the instruments with their respective properties:
- (A) Spectrophotometer: This optical instrument measures the intensity of light as a function of its wavelength. It is matched with (IV) Wavelength of light.
- (B) Kipp radiometer (Pyranometer): When fitted with a shading ring, a Kipp pyranometer is used to measure indirect solar radiation scattered by the atmosphere. It is matched with (III) Diffused radiation.
- (C) Pyradiometer: This instrument measures total radiation (the sum of incoming and outgoing solar and terrestrial radiation). It covers both shortwave solar and longwave thermal infrared radiation. It is matched with (I) Both short and long wave radiation.
- (D) Eppley spectral radiometer: This precision instrument measures radiation within specific spectral bands, particularly (II) Photosynthetically active radiation (PAR), which falls in the 400 to 700 nm wavelength range.
This matching sequence yields: (A)-(IV), (B)-(III), (C)-(I), (D)-(II), which corresponds to Option (C).

Step 4: Final Answer:
The correct matching sequence is (A)-(IV), (B)-(III), (C)-(I), (D)-(II).