Which one of the followingstatements is an icorrect statement ?

1.	Which one of the followingstatements is an icorrect statement ?
Answer» The phenomenon of beats is not observed in the case of visible light waves The decreases in the SPEED of sound at HIGH altitudes due to a FALL in pressure. Standing waves are characterised by NODES and antinodes. Transverse waves are characterised by crests and troughs. SOLUTION :A change in pressure has no effect on the speed of sound.

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