NEET Physics (general) MCQ Question
Which combination of statements about electromagnetic waves is correct?
Electromagnetic waves consist of oscillating electric and magnetic fields that are perpendicular to each other and to the direction of wave propagation.
The electric field in an electromagnetic wave can exist in a vacuum without the presence of a magnetic field.
In free space, the speed of electromagnetic waves is determined by the properties of the medium they travel through.
The frequency of an electromagnetic wave is inversely proportional to its wavelength and is constant in a given medium.
Correct Answer
Detailed Explanation
Statement A accurately describes the nature of electromagnetic waves as they consist of oscillating electric and magnetic fields that are perpendicular to each other and to the direction of propagation. Statement B is incorrect because the presence of a magnetic field is necessary for the existence of the electromagnetic wave. Statement C is incorrect as electromagnetic waves travel at the speed of light in a vacuum, independent of medium properties. Statement D is misleading since the frequency and wavelength relationship holds true, but frequency is not constant across different media.
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