Refraction is the change in the direction of the wave passing from one medium to another.
The change in the direction of the propagation of any wave is due to the different speed at different points.
A far away object appears closer and a small object appears larger.
Take an example. Suppose, an object lies in water.
A far away object appears closer. The angle from which the rays of light reach the observer is larger than the angle that it makes in air.
This makes the angular size larger to the observer's eye which makes the object look larger relative what it looks in air. Similar but vice versa condition occurs in the case when a small object appears larger.
Social tradition is important because of the following points:
(1).It helps to increase mutual understanding and cooperation between people of society.
(2).There is a great role of it in civilized society as it eradicates many social problems like murdering,theft,and many other violences.
(3)It helps to establish peace and stability in the society.
(4).It helps to maintain religious tolerance though which each and every people respect each other's religion.
(5)It increases feeling of brotherhood and ownness among the people of society.
(6) The most and much important point of importance of social tradition is that It helps to preserve our ancestors art, tradition,skills etc which surely teaches current generation about the lifestyle,skills etc
The answer to the question Which of the following do African rock paintings have that European and Australian rock paintings don't? would be the A "<span>shading".
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Answer:
Contrast Is the answer, I believe.
Answer:
Its pipes stood on top of a wind chest that was connected to a conical wind reservoir. The reservoir was supplied with air by one or two pumps. For the pipes to sound evenly, the wind chest needed steady air pressure. The open bottom of the cone was set in a tall outer container half filled with water.
Explanation:
