Wave EquationMediumQuestion 31366
Question
A wave y = 5×10⁻³ sin(100t − 2x) m. Amplitude, angular frequency, and wave number are:
- A5 mm, 100 rad/s, 2 rad/mCorrect
- B5 cm, 100 Hz, 2 m
- C5 mm, 100 Hz, 2 m
- D5 cm, 100 rad/s, 2 rad/m
Correct answer
5 mm, 100 rad/s, 2 rad/m
Explanation
A = 5×10⁻³ m = 5 mm. ω = 100 rad/s. k = 2 rad/m. (f = ω/2π ≈ 15.9 Hz, not 100 Hz.)