<span>The line that is drawn perpendicular to the point at which a wave intersects a boundary is know as the Normal .
When the normal is drawn, the incident ray makes an angle with it known as the angle of incidence and the reflected ray makes an angle with it known as the angle of incidence. These angles are always equal.
The refracted ray makes an angle with the normal known as angle of refraction. The sin of angle of incidence to the sin of angle of refraction is called the refractive index( </span>μ= <span>sin i / sin r) .
hope all of it helps you!</span>
Here is the answer. What is happening at the atomic level to give rise to the observed energy is that t<span>he </span>atomic level<span> is affected by the movement of electrons so as to </span><span>give rise to the observed energy. Hope this answers your question. Have a great day!</span>
Period = (1) / (frequency)
Period = (1) / (200 per second) = 0.005 second = 5 milliseconds
It is important to maintain septic systems in order to <span>prevent untreated sewage from contaminating groundwater</span>
Speed= distance/time
Speed= 150000m/7200s=20.83m/s(cor.to.2d.p.)