Electromagnetic waves and their characteristics (qualitative); transverse nature; electromagnetic spectrum (radio, microwaves, infrared, visible, ultraviolet, X-rays, gamma rays) and their uses.
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Q1 · Electromagnetic Waves · EASY
Which of the following electromagnetic waves has the longest wavelength?
Q2 · Electromagnetic Waves · EASY
The speed of electromagnetic waves in vacuum is 3 × 10^8 m/s. An electromagnetic wave has a frequency of 6 × 10^14 Hz. What is its wavelength?
Q3 · Electromagnetic Waves · MEDIUM
Electromagnetic waves are transverse in nature. Which of the following statements correctly describes this property?
Q4 · Electromagnetic Waves · MEDIUM
Which region of the electromagnetic spectrum is primarily used for satellite communication and radar systems?
Q5 · Electromagnetic Waves · HARD
An electromagnetic wave traveling in vacuum has an electric field amplitude of 60 V/m. If the speed of light is 3 × 10^8 m/s and the permittivity of free space ε₀ = 8.85 × 10^-12 C²/Nm², what is the average intensity of the wave? (Use I = (1/2)ε₀cE₀²)