Which example is not a part of the electromagnetic spectrum
1 answer:
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Answer:
a
The focal length of the lens in water is
b
The focal length of the mirror in water is
Explanation:
From the question we are told that
The index of refraction of the lens material =
The index of refraction of the medium surrounding the lens =
The lens maker's formula is mathematically represented as
Where is the focal length
is the index of refraction
are the radius of curvature of sphere 1 and 2 of the lens
From the question When the lens in air we have
When immersed in liquid the formula becomes
The ratio of the focal length of the the two medium is mathematically evaluated as
From the question
= 79.0 cm
and the refractive index of water(material surrounding the lens) has a constant value of
b
The focal length of a mirror is dependent on the concept of reflection which is not affected by medium around it.
2 atoms of P (phosphorus) and 5 atoms of O (oxygen)
Explanation:
The chemical formula of a generic compound is written as
where
A and B are the symbols of the elements contained in the compound
n and m are the number of atoms of each element, A and B respectively
In this problem, the compound given is
where:
- P is the symbol of the chemical element phosphorus
- O is the symbol of the chemical element oxygen
We see that the number following P is 2, so there are 2 atoms of phosphorus, while the number following O is 5, so there are 5 atoms of oxygen.
Learn more about compounds here:
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