Question

Question No. 40
1)The amount of energy transfer from
one point to other by the incident wave is
equal to the amount of energy transfer by
reflected wave at the same point in the
opposite direction. 2) The waves do not
travel in the medium, they only expand
and contract 3) There are some positions
in the medium which do not vibrate, the
points always remains at rest.​

Answer 1

Answer:

yes

Explanation:

it is correct it is a very good question

Answer 2

1. The amount of energy transfer from  one point to other by the incident wave is

equal to the amount of energy transfer by  reflected wave at the same point in the  opposite direction.

2. The waves do not  travel in the medium, they only expand  and contract :

The constituent particles of a standing waves moves in phase at a time. They moves in different phases, e.g., a particle is at 0° the other is at 10° the other is at 27° the other is at 71° another at 90°, and the phases change simultaneously, so they appears to be moving.

3.  There are some positions  in the medium which do not vibrate, the  points always remains at rest.​

These points are called antinodes. They are always in phase 0°. But it differs w.r.t the frame of reference, like- Pressure antinode is the distance node and vice-versa.