i. A wavefront is a line which contains all particles whose vibration are in phase.
ii. The direction of propagation of a wave is the link drawn parallel to the wavefront.
iii. A wavefront is a circle which is common to particles that are in the same state of disturbance
A. i only
B. ii only
C. i and ii only
D. i and iii only
E. ii and iii only
Correct Answer:
Option E – ii and iii only
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