Identify the correct statements from the following in the context of…

The correct answer is Option (2) → (B) and (D) only

(A) X-rays are not electromagnetic waves. — Incorrect. X-rays are a part of the electromagnetic spectrum, between ultraviolet and gamma rays, with wavelengths from about \( 10^{-8} \) m to \( 10^{-13} \) m.

(B) Electromagnetic waves are transverse in nature. — Correct. \( \vec{E} \) and \( \vec{B} \) are perpendicular to each other and to the direction of propagation.

(C) Electromagnetic waves can not be polarised. — Incorrect. Being transverse, they can be polarised; light passed through a polaroid is an everyday example.

(D) Electromagnetic waves travel with the speed of light in vacuum. — Correct. All electromagnetic waves travel in vacuum with \( c = 1/\sqrt{\mu_0\varepsilon_0} = 3\times10^{8}\,\mathrm{m\,s^{-1}} \).

NCERT (2026-27):
Electromagnetic Spectrum – “… We now know that, electromagnetic waves include visible light waves, X-rays, gamma rays, radio waves, microwaves, ultraviolet and infrared waves.”

Points to Ponder – “1. The basic difference between various types of electromagnetic waves lies in their wavelengths or frequencies since all of them travel through vacuum with the same speed.”

Introduction – “… Finally in Section 10.7 we will discuss the phenomenon of polarisation which is based on the fact that the light waves are transverse electromagnetic waves.”