Standing waves are formed on a string when interference occurs between two waves having
the same amplitude travelling in the same direction with no phase difference between them
the same amplitude, travelling in the opposite direction with no phase difference between them
different amplitudes travelling in the same direction
different amplitudes travelling in the opposite direction
The length of two open organ pipes are l and (l+ Δl) respectively. Neglecting end corrections the beats frequency between them will be approximately
For the stationary wave
The distance between a node and the next antinode is
7.5 cm
15 cm
22.5 cm
30 cm
A tuning fork produce 2 beats when sounded with one oscillator of frequency 514 Hz, and produces 6 beats with the other oscillator of frequency 510 Hz. The frequency of tuning fork is
516 Hz
510 Hz
514 Hz
520 Hz
To hear the echo in 1 s, the minimum distance of the source from the reflecting surface should be
28 m
18 m
19 m
165 m
Equation of a progressive sound wave is y = a sin where x in (metre), t (second), then frequency of wave is
200 Hz
400 Hz
500 Hz
600 Hz
Relation of wavelengths of sound and light is
λS < λL
λS > λL
λS = λL
None of these
B.
λS > λL
Wavelength of sound is greater than that of light λS > λL