Which of the following represents the typical wavelength range of...

The electromagnetic waves used for studying crystal structures are X-rays.

According to the electromagnetic spectrum, X-rays have a typical wavelength range from about $10^{-8}\text{ m}$ (10 nm) down to $10^{-13}\text{ m}$ ($10^{-4}$ nm).

The range $4 \times 10^{-7}\text{ m}$ to $6 \times 10^{-10}\text{ m}$ corresponds to ultraviolet rays.

The range $10^{-3}\text{ m}$ to $7 \times 10^{-7}\text{ m}$ corresponds to infrared waves.

The range $0.3\text{ m}$ to $10^{-3}\text{ m}$ corresponds to microwaves.

Answer: $10^{-8}\text{ m}$ to $10^{-13}\text{ m}$