Question

Please answer the following questions:-
Q1)Which of the following is not an appropriate condition for the formation of echoes?
(a) Minimum distance between the source of sound and reflecting body should be more than 17 m.
b) Temperature of air should be above 20°c.
(c) Wavelength of sound should be less than height of reflecting body.
(d) Intensity of sound should be sufficient so that it could be heard after reflection.
Q2)What is the nature of sound waves?
(a) Transverse
(b) Longitudinal
(c) Sometimes longitudinal sometimes transverse
(d) None of these

Answer 1

Answer:

1)Ans (c) Will be not an apporopriate answer.

2)Ans (c) Sometimes longitudinal sometimes transverse.