Inside a material with an index of refraction not equal to 1, both the speed and the wavelength of light must change. is the wav
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Answer:
Explanation:
Electrostatic Force
It's the force that appears between two electrical charges q1 q2 when they are placed at a certain distance d. The force can be computed by using the Coulomb's law:
We have an arrangement of 4 charges as shown in the image below. We need to calculate the total force exerted on the charge 2Q by the other 3 charges. The free body diagram is also shown in the second image provided. The total force on 2Q is the vectorial sum of F1, F2, and F3. All the forces are repulsive, since all the charges have the same sign. Let's compute each force as follows:
The distance between 3Q and 2Q is the diagonal of the rectagle of length l:
The force F3 is
Each force must be expressed as vectors. F1 is pointed to the right direction, thus its vertical components is zero
F2 is pointed upwards and its horizontal component is zero
F3 has two components because it forms an angle of 45° respect to the horizontal, thus
Now we compute the total force
Now we compute the magnitude
The direction of the total force is given by
