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Michelson, Morley and Sagnac experiments are interpreted. The main properties of the laser gyroscopes are considered, including the maximum sensitivity, the impact of the non-plane wave fronts and the impact of precession of moment vector of radiation on the laser gyro output. Autonomous resonatory sensor – a new type of linear laser accelerometer – has been created based on a linear laser rather than ring resonators. The proposed device operates without any straining or moving parts and uses standing wave of the coherent radiation in the resonator as the sensor of accelerated movement.