waves in communication [physics]

Question 1

rarefraction

Answer 1

the bending of rays as the move to one medium of the angle, during rarefraction light bends changes direction

Question 2

medium

Answer 2

can be anything as long as its transparent

Question 3

Oscillation

Answer 3

A regular repeating motion about a certain value

Question 4

Period

Answer 4

Time taken for one whole cycle of an oscillation , before motion starts to repeat itself

Question 5

Frequency

Answer 5

F=1/t , the number of whole cycles occurring in one second

Question 6

Displacement

Answer 6

How far the quantity that It is in oscillation has moved from its rest value at any given time

Question 7

Amplitude

Answer 7

Maximum value of displacement in the oscillation cycle

Question 8

Graphical representation of wave features EXAMPLES:

Answer 8

An example of an oscillating system is a piston in a motor car engine. The piston is connected to a rotating crank shaft . Both have same periodic time and frequency

Question 9

Defracction

Answer 9

The tendency for a wave to spread out in all directions ,transferring energy to its surroundings as it does so

Question 10

Diffraction gratings

Answer 10

Flat plane object . Has a series of regular lines on it that block parts of an advancing wave front.