1) Which electromagnetic wave has the shortest wavelength? a) X-rays b) UV rays c) Gamma rays d) Radio waves 2) Which physical quantity remains constant for all electromagnetic waves in vacuum? a) Wavelength b) Speed c) Frequency d) Amplitude 3) Electromagnetic waves are produced by: a) Accelerated charges b) Stationary charges c) Nuclear decay only d) Sound vibrations 4) Which EM wave is used for satellite communication? a) UV rays b) Radio waves c) Infrared d) Microwaves 5) If the frequency of an EM wave doubles, its wavelength in vacuum: a) Doubles b) Remains unchanged c) Becomes half d) Becomes zero

Basics of Electromagnetic Waves (Class 12 Physics)

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