(a) Distinguish between transverse wave and longitudinal wave. Give one example of each type. (b) A stretched string of length I and under a tension T, emits a note of fundamental frequency n. The tension is now reduced to T/2 and the vibrating length changed so that the frequency of the second harmonic is equal to n. Find out the new length of the string in terms of its original length.
Longitudinal waves cannot
What is a longitudinal wave ?
Protists having transverse and longitudinal groove in their theca are
Distinguish between 'sky waves' and 'space waves' modes of propagation in communication system. (a) Why is sky wave mode propagation restricted to frequencies upto 40 MHz?
Distinguish between Sky wave and Space wave modes of propagation in a communication system.
Distinguish between Sky wave and Space wave modes of propagation in a communication system.
Distinguish between sky wave and space wave modes of communication. What is the main limitation of space wave mode? Write the expression for the optimum separation between the transmitting and receiving antenna for effective reception of signals in this mode of communication.
Explain why (or how) : (a) In a sound wave, a displacement node is a pressure antinode and vice-versa, (b) Bats can ascertain distances, directions, nature and size of obstacles without any eyes, (c) a violin note and sitar note may have the same frequency, yet we can distinguish between the two notes, (d) Solids can support both longitudinal and transverse waves, but only longitudinal waves can propagate in gases, (e) The shape of pulse gets distorted during propagation in a dispersive medium.
Distinguish between sky wave and space wave propagation. Give a brief description with the help of suitable diagrams indicating how these waves are propagated.
