Given below are two statements:
Statement (I) : X-rays are electromagnetic waves with wavelengths in the range 0.1 Å to 100 Å.
Statement (II) : X-rays are used in studying crystal structure and complex molecules.
In the light of the above statements, choose the most appropriate answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Both Statement I and Statement II are true
X-rays are electromagnetic waves of very short wavelength, lying between ultraviolet rays and gamma rays in the electromagnetic spectrum.
Statement (I): X-rays are electromagnetic waves with wavelengths in the range 0.1 Å to 100 Å. Correct. X-rays have wavelengths from about 0.1 Å to 100 Å (0.01 nm to 10 nm), far shorter than those of visible light (about 4000 Å to 7000 Å).
Statement (II): X-rays are used in studying crystal structure and complex molecules. Correct. Their wavelength is about the same as the spacing between atoms, so a crystal diffracts them. The pattern of X-ray diffraction reveals how the atoms are arranged; it was used to find the structure of DNA and of many proteins.