SICS A body is under the action of two
forces 100N and 80N. Find the
resultant of the two forces if
the two forces are inclined at
angle of 120° to each other.
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Light from a sodium lamp passes through a diffraction grating that has 1000 slits per millimeter. the interference pattern is viewed on a screen 1.000 m behind the grating. the first (m = 1) two bright yellow fringes that are visible are 0.7288 m and 0.7300 m from the central maximum. what are the wavelengths of these two fringes?