NEET Physics EM Spectrum MCQ Question
Which combination of statements about electromagnetic waves is correct?
All electromagnetic waves travel through a vacuum at the same speed, and their interaction with matter is determined by their frequency.
Electromagnetic waves of different frequencies can have the same wavelength, and their propagation direction is always aligned with their electric field vector.
Accelerated charges do not emit electromagnetic waves, and X-rays are produced by accelerating electrons in circuits.
The wavelength of a wave is inversely proportional to its frequency, and infrared waves primarily cause thermal effects in materials by increasing molecular motion.
Correct Answer
Detailed Explanation
Electromagnetic waves indeed travel through a vacuum at the same speed, and their interaction with matter is primarily determined by their frequency, as stated in the points to ponder section. Statement D is also true but does not encompass the complete nature of EM waves as effectively as A.
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