In Longitudinal waves, particles of the medium vibrate around their mean positions. Their amplitude of vibration is in the direction of the propagation of the wave. In transverse wave of longitudinal wave, <em>the wavelength is always the distance between two particles which are in the same phase.</em>
If we take pressure waves, (sound waves), we have pressure variations created by sound wave along its path. Pressure is maximum at compression regions and pressure is minimum at rarefaction region. In between the two, pressure of air remains as the pressure when there is no wave.
<em>The wave length is then the distance between two consecutive rarefactions or two consecutive compression regions.</em>
<em>It is also the distance traveled by the wave in one time period.</em> Time period is the time the particles in the medium take to vibrate towards the end, turn back to reach the other end of their oscillation and then reach back their position.
Answer:
1.Animal feed is food given to domestic animals in the course of animal husbandry
2.) Roughages B) Concentrates C) Feed supplements and Feed additives
3. Feed grains
4.pliers, vacuum lifters, magnetic lifters, and stock positioners
Explanation:
<u>1.Animal feed is food given to domestic animals in the course of animal husbandry</u>
<u>2.) Roughages B) Concentrates C) Feed supplements and Feed additives</u>
<u>3. Feed grains </u>
<u>4.pliers, vacuum lifters, magnetic lifters, and stock positioners</u>
Answer:
Light microscopes use light and glass objectives to illuminate and magnify objects
Explanation:
Light microscopes and electron microscopes are used to study cells. The electron microscope has many times more resolving power than the ordinary light microscope. A light microscope contains an objective lens and an eyepiece through which the final image is seen.
Both light and electron microscopes magnifies the image of the object. The magnifying power of an electron microscope is many times that of the light microscope.
Answer:
62.5 %
Explanation:
Let the initial intensity of unpolarized light is Io.
After first polariser the intensity of light becomes I'.
So, 
Now it passes through another polariser. The angle between the first polariser and the second polariser is given by Ф. The intensity is I''.
According to the law of Malus

Here, Ф = 30 degree

The percentage change in the intensity is given by

= 62.5 %