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.
Instrumental music throughout the Renaissance was closely associated with vocal music. Only at the Sistine Chapel in Rome, and at a few other chapels with choirs of competent singers, was polyphonic church music consistently sung unaccompanied. Elsewhere the organ, lute, viols, or other instruments accompanied, doubled, or substituted for voices, and organists developed a huge repertory of music for use in church services, including preludes, interludes, and arrangements of liturgical melodies. In secular music, the lute remained popular both for solos and in ensembles; clavier instruments were coming into wider use, and hundreds of pieces were written for chamber music ensembles.
They wiil cause the economy to go down financially.<span />
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Explanation:
it shows elements of art by using squars and reusing an item to make art ...I think bye bye