Question

5. The phase difference between two points separated
by 1 m in a wave of frequency 120 Hz is 90°. The
wave velocity is
[KCET 1999)
(a) 180 m/s (b)240 m/s (c) 480 m/s (d)720 m/s​

Answer 1

Answer:

720

frequency is inversely proportional to wavelength....wave velocity is equal to multiplication of frequency and wavelentj

Answer 2

1= lamda/2 pi*2 pi

1=lamda/4

lamda=4m ,hence v=n*lamda =120*4=480m/ sec