Practicing Self-Care. 1  1. Take care of yourself. There are many small steps to this one action. 2  2. Put care into your appearance. You don't have to look like Brad Pitt to start building your self confidence. 3  3. Exercise regularly. Part of taking care of yourself is getting exercise.  4. Sleep well.
Stationary Waves. Stationary or standing waves are formed in a medium when two waves having equal amplitude and frequency moving in opposite directions along the same line, interfere in a confined space. Generally, such waves are formed by the superposition of a forward wave and the reflected wave. Both longitudinal and transverse types of waves can form a stationary wave. When reflection occurs at a free end, there is no reversal of phase. i.e., a crest returns as a crest and a trough as a trough.
The form of any wave (matter or electromagnetic) is determined by its source and described by the. shape of its wavefront, i.e., the locus of points of constant phase. If a traveling wave is emitted by. a planar source, then the points of constant phase form a plane surface parallel to the face of the. source. Such a wave is called a plane wave, and travels in one direction (ideally). Since energy is. conserved, the total energy in the wave must equal the energy emitted by the source, and therefore. the energy density (the energy passing through a unit area), is constant for a plane wave.