Question

Match List-1 with List-2
List-1 (Instrument)
(A) Eppley Spectral Radiometer
(B) Kipp Radiometer
(C) Pyradiometer
(D) Spectrophotometer

List-2 (Measurement/Use)
(I) Both short and long wave radiation
(II) Photosynthetically Active Radiation (PAR)
(III) Wavelength of light
(IV) Diffused radiation

Choose the correct answer from the options given below:

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

Hint:

Learn the functions of common radiometers:
Eppley: PAR;
Kipp: Diffused;
Pyradiometer: Net radiation;
Spectrophotometer: Wavelength.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Various instruments are used in meteorology and plant sciences to measure different types of radiation.
Each instrument has a specific function.

Step 2: Key Approach:
Match the instrument with its primary purpose.

Step 3: Detailed Explanation:
(A) Eppley Spectral Radiometer: Measures Photosynthetically Active Radiation (PAR) (II).
It is used to measure the quantum flux in the 400-700 nm range.
(B) Kipp Radiometer: Measures diffused radiation (IV).
It is a pyranometer that measures solar radiation, but can be used for diffused.
Actually, Kipp and Zonen is a brand that makes pyranometers for solar radiation, but in this context, it's paired with diffused radiation.
(C) Pyradiometer: Measures both short and long wave radiation (I).
It is used to measure net radiation.
(D) Spectrophotometer: Measures wavelength of light (III).
It is used to measure absorbance or transmittance at specific wavelengths.
Thus, the correct matching is:
(A) - (II), (B) - (IV), (C) - (I), (D) - (III).
This is option (B).
Eppley radiometer is specifically used for PAR.
Kipp radiometer is for diffused radiation.
Pyradiometer is for net radiation (short + long).