Question

Choose the correct answer from the alternatives given.
Which of the following electromagnetic waves have the smallest wavelength?

• A. $\gamma$-rays
• B. $X$-rays
• C. UV waves
• D. Infrared rays

Answer 1

Answer: (A)

$\gamma$-rays

All electromagnetic waves travel at the same speed.

Speed $=$ wavelength $\times$ frequency.

Since frequency of $\gamma$ rays is the largest, their wavelength must be the smallest.