Suzette had prepared the graph below to add to her lab
2 answers:
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Answer:
The focal length of the lens is 34.047 cm
The power of the needed corrective lens is 2.937 diopter.
Explanation:
Distance of the object from the lens,u = 26 cm
Distance of the image from the lens ,v= -110 cm
(Image is forming on the other side of the lens)
Since ,lens of the human eye is converging lens,convex lens.
Using a lens formula:
f = 34.047 cm = 0.3404 m
Power of the lens = P
To solve this problem we will apply the concepts related to Energy defined in the capacitors, as well as the capacitance and load. From these three definitions we will build the solution to the problem by defending the energy with the initial conditions, the energy under new conditions and finally the change in the work done to move from one point to the other.
Energy in a capacitor can be defined as
Here,
V = Potential difference across the capacitor plates
Q = Charge stored on the capacitor plates
At the same time capacitance can be defined as,
Here,
Vacuum permittivity constant
A = Area
d = Distance
Replacing with our values we have that,
PART A) Energy stored in the capacitor is
PART B) We know first that everything that the load can be defined as the product between voltage and capacitance, therefore
Now if we have that the capacitance is
Then the energy stored is
PART C) The amount of work or energy required to carry out this process is the difference between the energies obtained, therefore