Unpolarized light travels through 2 linear polarizers. what (minimum) angle should the second polarizer be relative to the first polarizer (the difference between q1 and q2) so that the final intensity of light is 1/3 the original value?
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Ответ:
To solve this exercise it is necessary to apply the considerations made in the Malus Law.
This law indicates that the intensity of a linearly polarized ray of light, which passes through a perfect analyzer and vertical optical axis is equivalent to:
Where,
I = Resulting intensity
In the case where the light is unpolarized the intensity is considered as the intensity of the linearly polarized light transmitted by the first polarizer is
Given tat the intensity of light after coming out of the second polarizer is
Applying Malus's law then we have to,
Ответ:
Kinetic friction is defined as a force that acts between moving surfaces.
Explanation:
The kinetic friction is a part of everything and it interferes motion of two or more objects.