During what phase of the moon does a lunar eclipse occur?

A lunar eclipse happens when the moon passes into the Earth's shadow. Therefore this happens during a full moon, when the illuminated side of the moon is facing the Earth. The sun, Earth and moon have to lie along a straight line.

when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave

if you add everything up correctly you should get 69 i got this because 50 plus 19 is it