Alight with a second-order dark band forms a diffraction angle of 20.0°. the diffraction grating has 200.0 lines per mm what is the wavelength of the light

some think that theories become laws, but theories and laws have separate and distinct roles in the scientific method. a law is a description of an observed phenomenon in the natural world that hold true every time it is tested. it doesn't explain why something is true; it just states that it is true.

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it breaks and dirupture other materials and other sencews from the bottom