Question

Match List-I (Types of waves) with List-II (Order of frequency):

	List-I		List-II
A.	X-rays	I.	$\nu = 10^{4} Hz$
B.	UV rays	II.	$\nu = 10^{16} Hz$
C.	Radio waves	III.	$\nu = 10^{10} Hz$
D.	Microwaves	IV.	$\nu = 10^{18} Hz$

1. A-IV, B-II, C-I, D-III
2. A-III, B-II, C-IV, D-I
3. A-I, B-II, C-III, D-IV
4. A-III, B-I, C-IV, D-II

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

Answer 1

Answer: (A)

A-IV, B-II, C-I, D-III

Answer 2

Recall the approximate frequency ranges for different types of electromagnetic waves:

• Radio waves: typically $10^4 \text{ Hz}$ to $10^6 \text{ Hz}$.
• Microwaves: typically $10^8 \text{ Hz}$ to $10^{11} \text{ Hz}$.
• UV rays: typically $10^{14} \text{ Hz}$ to $10^{16} \text{ Hz}$.
• X-rays: typically $10^{16} \text{ Hz}$ to $10^{19} \text{ Hz}$.

Match the given wave types with the frequencies provided in List-II:

• A. X-rays correspond to frequencies in the order of $10^{18} \text{ Hz}$ (IV).
• B. UV rays correspond to frequencies in the order of $10^{16} \text{ Hz}$ (II).
• C. Radio waves correspond to frequencies in the order of $10^4 \text{ Hz}$ (I).
• D. Microwaves correspond to frequencies in the order of $10^{10} \text{ Hz}$ (III).

The correct matching is A-IV, B-II, C-I, D-III.