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A diffraction grating with slits separated by 3.40 x 10-6 m is illuminated by light with a wavelength of 589 nm.
The separation between lines in the diffraction pattern is 0.25 m.
What is the distance among the diffraction grating and the screen?
What is magnetic moment of a bar magnet 1. When a bar magnet of pole strength (m) and length (2l) is suspended freely in air,it always turns along the magnetic north (N) and S
why we can''t reduce the range of AN AMMETER ?
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