Question

If the equation of transverse wave $(h=6.6\times {10}^{-34}J.s,c=3\times {10}^{8}m/s)$ where distance is in cm and time in sec, then the wavelength of wave will be :

• A. 20 cm
• B. 40 cm
• C. 60 cm
• D. none of these

Answer 1

Answer: (B)

The equation of transverse wave is $y=5\sin 2\pi \left[\frac{t}{0.04}-\frac{x}{40}\right]$ ??.(i) Now standard equation of transverse wave is $y=a\sin 2\pi \left[\frac{t}{T}-\frac{x}{\lambda }\right]$ ??(ii) Comparing equations (i) and (ii), we get $\frac{x}{\lambda }=\frac{x}{40}$ or $\lambda =40cm$