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Randomly polarized light (such as sun light) with intensity of I0 passes through three polarizers (P1, P2, P3) consecutively. P1 and P3 are stationary, and their polarization planes are perpendicular to each other. In contrary, the polarization plane of P2 is rotating at an angular frequency of w0. Assume the polarization plane of P2 is parallel to that of P1 at t=0. Please calculate the final intensity I3(t).
Can you explain coherent sources of light?
A copper wire whose diameter is 0.16 cm carries a steady current of 10 A. What is the current density of the wire?Also calculate the drift velocity of the electrons in copper.
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What is the specific resistance of material of a conductor. What do you mean by thermoelectric refrigerators?
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