Question

wave 1and 2 are propagating with speeds 200m/s and 500m/s wave length of 1 is ten times smaller than 2 thenratio of time period of 2 to that of 1 is​

Answer 1

Explanation:

v1 = 200 m/s

v2= 500 m/s

lamda 1 = lamda2/10

k1= 2π/ lambda1

k1=2π × 10 /lamda 2

k2 = 2π / lamda 2

v1 = w1/k1

w1= v1 k1

= 200× 2π×10/ lamda 2

w1= 4π × 10^3/ lamda 2

w2 = v2 k2

= 500 × 2π/lamda 2

= 10^3π/ lamda 2

T2/T1 = w2/w1

= 10^3 /4×10^3

=0.25