<em><u>Interference of a wave</u></em> is the property a wave that occurs when two waves travelling in the same medium meet at a point or superpose at a point in the medium.
<em><u>Interference may be constructive or destructive. Constructive occurs when two identical waves travelling in the same medium in phase meet at a point.</u></em> The resulting wave has twice the amplitude of the individual waves.
<em><u>Destructive interference occurs when two waves travelling in the same medium meet and out of phase.</u></em> The resulting amplitude will be zero if the initial waves are identical, or the difference between the amplitude of the original waves if they are not identical.
Therefore; <em><u> If the two waves one with an amplitude 75 units and the other 74 units, are out of phase with each other, the resultant amplitude of the resulting wave will be 1 unit, the difference between the amplitude of the original waves.</u></em>
If the two waves have the SAME FREQUENCY and are exactly out of phase (180° apart), then the resultant wave will have the same frequency and an amplitude of 1 unit.
If the two waves do not have the SAME FREQUENCY, then their relative phase is meaningless.
Magnesium hydroxide is the inorganic compound with the chemical formula Mg(OH)2. Magnesium hydroxide is a common component of antacids, such as milk of magnesia, as well as laxatives
When object is placed between the focus (F) and pole (P) of a concave mirror, magnified and erect image of the object is formed on the back of the mirror.
When object is placed between the centre of curvature and the principal focus of a concave mirror, magnified and inverted image is formed in front of the mirror.
Since it is moving with a constant velocity therefore net force on it is zero
Tension force=weight
T=mg
Work done by Tension T is
Work done by Gravity will be equal in magnitude but opposite in sign and can be obtained by work energy theorem which states that change in kinetic energy of object is equal to work done by all the forces
