Question

Match the list-I with list-II and choose the correct option.

	List-I		List-II
(A).	Microwave	(P).	1 nm - 400nm
(B).	Ultraviolet	(Q).	1 nm - 1nm
(C).	X-rays	(R).	2.5 µm - 750nm
(D).	Infrared	(S).	1 µm - 1nm

• A. A-(s), B-(q), C-(r), D-(p)
• B. A-(s), B-(p), C-(q), D-(r)
• C. A-(p), B-(s), C-(q), D-(r)
• D. A-(r), B-(q), C-(s), D-(p)

Answer 1

The Correct Option is A

Understanding the Problem

We are given different types of electromagnetic waves and their corresponding wavelength ranges. We need to match the waves with their correct uses based on their wavelengths.

Solution

1. Microwave:

Has a wavelength \( \lambda > 700 \, \text{nm} \).

Suitable for communication purposes.

2. Ultraviolet:

Has wavelengths less than \( 400 \, \text{nm} \).

Typically used for sterilization and curing.

3. X-Ray:

Has a very short wavelength in the range of \( 1 \, \text{nm} \) to \( 10^{-3} \, \text{nm} \).

Ideal for medical imaging.

4. Infra-red:

With a wavelength between \( 400 \, \text{nm} \) to \( 700 \, \text{nm} \).

Used in thermal cameras and night vision technologies.

Matching Waves with Wavelengths

Based on the wavelength ranges and uses, we can match the waves as follows:

Microwave - Communication

Ultraviolet - Sterilization

X-Ray - Medical Imaging

• Infra-red - Thermal Imaging

Final Answer

Therefore, matching the waves with their wavelengths gives us the correct answer as option (2).