For both reasons, owing to the thermal motion and to the working together of various wavelengths, factors arise which, in a similar manner to the structural factor, exert some influence upon the brightness of the interference points but not upon their location.
The brave and capable women who served in Iraq and Afghanistan have performed admirably.
Students today are a pretty solemn lot. One of the really notable achievements of the twentieth century has been to make the young old before their time.