Physics-EM Spectrum

NEET Physics EM Spectrum MCQ Question

Type: MCQ-conceptual-Medium-Class 12

Which combinations of statements about the electromagnetic spectrum are correct?

A

Electromagnetic waves can be classified based on their frequency and mode of production. There is a clear boundary between different types of electromagnetic waves.

B

The electromagnetic spectrum includes visible light, X-rays, and gamma rays. All electromagnetic waves travel at different speeds in a vacuum.

C

Electromagnetic waves interact differently with matter based on their wavelength. Radio waves are produced by accelerated electrons in a circuit.

D

Ultraviolet waves have longer wavelengths than X-rays. The electromagnetic spectrum was fully understood before the discovery of X-rays.

Correct Answer

Option C

Detailed Explanation

Statement C is correct as it reflects the understanding that the interaction of electromagnetic waves with matter varies with wavelength and mentions the source of radio waves as accelerated electrons. The other statements contain inaccuracies regarding classification boundaries and wave speeds.

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