Target Exam

CUET

Subject

Physics

Chapter

Electromagnetic Waves

Question:

The magnetic field in a plane electromagnetic wave is given by $B = 3 × 10^{-7}\sin(1.5x + 5 × 10^8t) T$, where x is in meter and t is in second. The wavelength of the wave is: (Take: $π = 3$)

Options:

1.5 m

3 m

4 m

2.5 m

Correct Answer:

4 m

Explanation:

The correct answer is Option (3) → 4 m