Question

I. In the following questions, identify different option from other three.
38. a) Light waves
b) Sound waves in air
c) Vibrations in a rope
c) Vibrations in a stretched string
39.
a)waves in a helical spring
b) Ripple formed due to a stone thrown into a pond
c) Tsunamic waves
d) Seismic waves
40. a) waves length
b) length
c) Time period
d) Vibration​

Answer 1

Answer:

1. light waves

39.ripple formed due to a stone thrown into a pond

40.length

Answer 2

Answer:

a).b).c).d).

these options are correlated with each other.