What are subsets, power sets and universal sets?
Answers
subset :
a set A is a subset of a set B, or equivalently B is a superset of A, if A is contained in B. That is, all elements of A are also elements of B (note that A and B may be equal).
power set :
the power set of any set S is the set of all subsets of S, including the empty set and S itself, variously denoted as P, , ℘, P, ℙ, or, identifying the powerset of S with the set of all functions from S to a given set of two elements, 2S.
universal set :
universal set is a set which contains all objects, including itself. In set theory as usually formulated, the conception of a universal set leads to Russell's paradox and is consequently not allowed. However, some non-standard variants of set theory include a universal set.
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Answer:
If an opaque object on the path of light becomes very small, light has a tendency to bend around it and not walk in a straight line. This effect is known as diffraction of light.
Answer:
If an opaque object on the path of light becomes very small, light has a tendency to bend around it and not walk in a straight line. This effect is known as diffraction of light.