Question

Column - I lists the waves of the electromagnetic spectrum. Column - II gives approximate frequency range of these waves. Match Column - I and Column - II and choose the correct match from the given choices.

• A. (A)-(R) (B)-(S) (C)-(Q) (D)-(P)
• B. (A)-(R) (B)-(S) (C)-(Q) (D)-(Q)
• C. (A)-(P) (B)-(Q) (C)-(S) (D)-(R)
• D. (A)-(R) (B)-(S) (C)-(P) (D)-(Q)

Hint:

To match electromagnetic waves to their frequency ranges, remember that radio waves have the lowest frequencies, followed by microwaves, infrared, and X-rays with progressively higher frequencies.

Answer 1

The Correct Option is B

Let's match each type of wave to its approximate frequency range: 
- Radio waves (A): Radio waves generally have a frequency range from \( 10^8 \) to \( 10^{20} \) Hz. This corresponds to option (R). 
- Microwaves (B): Microwaves typically range from \( 10^{10} \) to \( 5 \times 10^{14} \) Hz. This corresponds to option (S). 
- Infrared (C): Infrared waves have a frequency range from \( 10^{12} \) to \( 10^{15} \) Hz. This corresponds to option (Q). 
- X-rays (D): X-rays have a frequency range of \( 10^{16} \) to \( 10^{20} \) Hz. This corresponds to option (Q). 

Thus, the correct matching is (A)-(R) (B)-(S) (C)-(Q) (D)-(Q), which corresponds to answer choice B.