For any wave, the product of
(frequency) x (wavelength)
is constant ... it's the wave's speed.
So you can see that if either the frequency or the wavelength changes, the other one must change in the opposite direction, to keep their product constant.
Shorter wavelength <==> higher frequency.
Longer wavelength <==> lower frequency.
To solve this problem it is necessary to apply the concepts related to the condition of path difference for destructive interference between the two reflected waves from the top and bottom of a surface.
Mathematically this expression can be described under the equation
![\delta = 2nt](https://tex.z-dn.net/?f=%5Cdelta%20%3D%202nt)
Where
n = Refractive index
t = Thickness
In terms of the wavelength the path difference of the reflected waves can be described as
![\delta = \frac{\lambda}{4}](https://tex.z-dn.net/?f=%5Cdelta%20%3D%20%5Cfrac%7B%5Clambda%7D%7B4%7D)
Where
\lambda = Wavelenght
Equation the two equations we have that
![2nt = \frac{\lambda}{4}](https://tex.z-dn.net/?f=2nt%20%3D%20%5Cfrac%7B%5Clambda%7D%7B4%7D)
![t = \frac{\lambda}{8n}](https://tex.z-dn.net/?f=t%20%3D%20%5Cfrac%7B%5Clambda%7D%7B8n%7D)
Our values are given as
Wavelength of light
![n = 1.4](https://tex.z-dn.net/?f=n%20%3D%201.4)
![t = \frac{380nm}{8*1.4}](https://tex.z-dn.net/?f=t%20%3D%20%5Cfrac%7B380nm%7D%7B8%2A1.4%7D)
![t = 33.93nm](https://tex.z-dn.net/?f=t%20%3D%2033.93nm)
Therefore the minimum thickness of the oil for destructive interference to occur is approximately 34.0 nm
Answer:
hurricanes are the most awesome Violet storms on the earth people call the storms by other names such as typhoon or cyclone depending on where the car whatever they are called topical cologne all from the same way
Explanation:
so technically hurricanes are the most Violet storms
Answer:
Towards the west
Explanation:
Magnetic force is the interaction between a moving charged particle and a magnetic field.
Magnetic force is given as
F = q (V × B)
Where F is the magnetic force
q is the charge
V is the velocity
B is the magnetic field
V×B means the cross product of the velocity and the magnetic field
NOTE:
i×i=j×j×k×k=0
i×j=k. j×i=-k
j×k=i. k×j=-i
k×i=j. i×k=-j
So, if the electron is moving southward, then, it implies that the velocity of it motion is southward, so the electron is in the positive z-direction
Also, the electron is curved upward due to the magnetic field, this implies that the force field is directed up in the positive y direction.
Then,
V = V•k
F = F•j
Then, apply the theorem
F •j = q ( V•k × B•x)
Let x be the unknown
From vector k×i =j.
This shows that x = i
Then, the magnetic field point in the direction of positive x axis, which is towards the west
You can as well use the Fleming right hand rule
The thumb represent force
The index finger represent velocity
The middle finger represent field