Question

X-ray electromagnetic radiation lies in the range

• A. $2.5\ \mu\text{m}$ to $25\ \mu\text{m}$
• B. $400\text{ nm}$ to $800\text{ nm}$
• C. $0.1\text{ nm}$ to $1\text{ nm}$
• D. $10\text{ nm}$ to $100\text{ nm}$

Hint:

Familiarity with the standard boundaries of the electromagnetic spectrum is critical for instrument-related questions.
X-rays have wavelengths on the order of atomic spacings ($\approx 1\text{ \AA}$ or $0.1\text{ nm}$), which is why they are ideal for crystal diffraction studies.

Answer 1

The Correct Option is C

Step 1: Understanding the Question:
This question requires identifying the typical wavelength range corresponding to X-ray electromagnetic radiation from the given options.

Step 2: Detailed Explanation:

• Electromagnetic radiation is classified by wavelength and frequency into different regions.

• Let us analyze each option to identify the correct spectral region:

• Option (A) $2.5\ \mu\text{m}$ to $25\ \mu\text{m}$ lies in the Infrared (IR) region, which is primarily used in vibrational spectroscopy.

• Option (B) $400\text{ nm}$ to $800\text{ nm}$ represents the Visible light spectrum detectable by the human eye.

• Option (C) $0.1\text{ nm}$ to $1\text{ nm}$ ($1\text{ \AA}$ to $10\text{ \AA}$) lies within the characteristic range of X-ray radiation.

• Option (D) $10\text{ nm}$ to $100\text{ nm}$ represents the Extreme Ultraviolet (EUV) region.

• X-rays are highly energetic electromagnetic waves with wavelengths typically ranging from approximately $0.01\text{ nm}$ to $10\text{ nm}$.

• Therefore, the range $0.1\text{ nm}$ to $1\text{ nm}$ falls directly inside the established X-ray region.

Step 3: Final Answer:
The correct wavelength range for X-ray electromagnetic radiation is $0.1\text{ nm}$ to $1\text{ nm}$.