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Definition
A radical expression is an expression containing a square root.
Examples of Radical Expression
are examples of radical expression.
It is also an example of Redical Expression
To solve this kind of equations, remember when you have a
variable inside a square root, you undo the root by doing the
opposite: squaring. 

Example:
Given , you would square both sides:

More about Radical Expression
Radical: Thesymbol that is used to denote square root or nth roots.
Radicand: Radicand is a number or expression inside the radical symbol.
For example, 5 is the radicand in.
Radical equation: An equation containing radical expressions with variables in the radicands.
Radical inequality: An inequality containing a radical expression with the variable in the radicand.
Solved Example on Radical Expression
Evaluate the radical expression when a = 2 and b = 4.
Choices:
A. 9
B. 8
C. 7
D. 6
Correct Answer: D
Solution:
Step 1: [Substitute the values of a and b in the given radical expression.]
Step 2: [Find the positive square root.]
Step 3: [Multiply.]
Step 4: [Add.]
Step 5: = 6 [Simplify.]
The terms which are Related for Redical Expression
 Expression
 Square Root
 Variable
 Radicand
 Radical
 Radical Equation
 Radical Inequality
Note: You can always check your answers in a solved
equation by plugging your answer back into the original equation and
making sure that it fits. (This is because the very act of squaring the
sides can
create solutions that never existed before).
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Oscillation is the repetitive variation, typically in time, of some measure about a central value (often a point of equilibrium) or between two or more different states. Familiar examples include a swinging pendulum and AC power. The term vibration
is sometimes used more narrowly to mean a mechanical oscillation but is
sometimes used as a synonym of "oscillation". Oscillations occur not
only in physical systems but also in biological systems, from human society to the brain.
MicroScope
A
microscope (from the Ancient Greek:
μικρός,
mikrós, "small" and
σκοπεῖν,
skopeîn, "to look" or "see") is an instrument
used to see objects that are too small for the naked eye.
Compound Microscope
A simple microscope is used to observe small objects. However it cannot be used tosee very minute objects like blood corpuscles, plant and animal cells, microorganisms like bacteria etc. For observing these objects, we use an opticalinstrument called a compound microscope.
Construction
A compound microscope consists of the following parts:
The objective lens of a compound microscope is a convex lens of very short focal length (f
_{o}) that is f
_{o} < 1cm. The object to be seen is kept very close to the objective lens.
The eye piece of a compound microscope is also a convex lens of short focal length f
_{e}. But f
_{e} > f
_{o}.
The objective lens and the eyepiece are mounted coaxially (having a
common axis) at the ends of two brass tubes which can be made to slide
into each other so that the distance between the two lenses can be
adjusted.
Working
 The objective produce a real inverted & magnified image of the object.
 The eye piece is placed within the focal length of the object infront of the image formed by it.
 The eye piece serve as magnifying glass & produces a very much enlarged image of the object which is inverted.
Uses
It is used by Pathologists,Microbiologists in laborateries
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