Question

Match List-I with List-II

List-I (Type of radiation)	List-II (Wavelength)
(A) Red	(I) <400 nm
(B) Blue	(II) 450-500 nm
(C) Ultraviolet	(III) >760 nm
(D) Infrared	(IV) 620-760 nm

Choose the correct answer from the options given below

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

Hint:

Remember the order of the electromagnetic spectrum by wavelength:
Ultraviolet (<400 nm) \( < \) Visible Light (400-760 nm) \( < \) Infrared (>760 nm).
Within visible light, Blue (450-500 nm) has a shorter wavelength than Red (620-760 nm).

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Solar radiation is electromagnetic radiation emitted by the sun, spanning a wide range of wavelengths.
The solar spectrum is divided into ultraviolet, visible (photosynthetically active radiation, PAR), and infrared regions, each with characteristic wavelength ranges.

Step 2: Detailed Explanation:
Let us match each radiation type with its corresponding wavelength range:
1.Red radiation (A): Red light is located at the longer wavelength end of the visible spectrum.
Its wavelength range is approximately \( 620\text{ nm} \) to \( 760\text{ nm} \).
Thus, (A) matches with (IV).
2.Blue radiation (B): Blue light is located at the shorter wavelength end of the visible spectrum.
Its wavelength range is approximately \( 450\text{ nm} \) to \( 500\text{ nm} \).
Thus, (B) matches with (II).
3.Ultraviolet (UV) radiation (C): UV radiation consists of high-energy, short-wavelength radiation located just below the visible violet range.
Its wavelength is less than \( 400\text{ nm} \).
Thus, (C) matches with (I).
4.Infrared (IR) radiation (D): IR radiation consists of low-energy, long-wavelength thermal radiation located beyond the visible red range.
Its wavelength is greater than \( 760\text{ nm} \).
Thus, (D) matches with (III).
Combining these matches gives:
\[ \text{(A)-(IV), (B)-(II), (C)-(I), (D)-(III)} \]

Step 2: Final Answer:
The correct matching sequence is (A) - (IV), (B) - (II), (C) - (I), (D) - (III).