Polarized light is incident on 7 polarizing sheets. the axis of the first polarized sheet makes an angle θ with the plane of polarization. each subsequent sheet has an axis that is rotated by an angle θ from that of adjacent sheets. find θ if 92% of the incident intensity is transmitted by the sheets. ° suppose you want to rotate the plane of polarization of a beam of polarized light by 65°, but you do not want the final intensity to be < 66% of the initial intensity. what is the minimum number of polarizing sheets you must use? sheets

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electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

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amplitude

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