A grating has 776 lines per centimeter. find out the angles, Ask an Expert

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Q. A very long wire carrying a conventional current of 2.9 amperes is straight except for a circular loop of radius 6.2 cm . Calculate the approximate magnitude and the direction of the magnetic field at the center of the loop.

Q. A grating has 776 lines per centimeter. Find the angles of the first three principal maxima above the central fringe when this grating is illuminated with 603 nm light.

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