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1. A diffraction grating has 5922 lines per centimeter ruled on it. If the angular position...

1. A diffraction grating has 5922 lines per centimeter ruled on it. If the angular position of the third-order bright maximum is 59 degrees as measured from the center of the screen.The wavelength of the light illuminating the grating is close to (in nm):

2. The maximum magnetic field strength of an electromagnetic wave is 4 mT. The wave passes through a loop of diameter 14 mm. The average power P through the loop (in kW) is close to:

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