Question

Which of the following electromagnetic radiations have the longest wavelength ?

• A. X-rays
• B. $\gamma -rays$
• C. Microwaves
• D. Radiowaves

Answer 1

Answer: (D)

Radiowaves

Answer 2

| Rays
| Wave length[Range in m]

---|---|---

| X-rays
| $1\times10^{11}$ to $3\times10^{-8}$

| y-rays
| $6\times10^{-14}$ to $1\times10^{-11}$

| Microwaves
| $10^{-3}$ to $0.3$

| Radiowaves
| $10$ to $10^4$