Student compound microscope magnification-100x and 550x what is the meaning of grating element for a diffraction grating In terms of display

In terms of display

The Steel Bong Magnetic Compass comes with a simplified guide for beginners

or conducting educational experiments

It can measure the internal and external dimensions of objects

Student compound microscope magnification-100x and 550x what is the meaning of grating element for a diffraction grating In terms of displayStudent compound microscope magnification 100x and 550x MAGNIFICATION 100X AND 550X, TWO HUYGENIAN EYE PIECES 10X AND 15 X, TWO ACHROMATIC OBJECTIVES 10X AND 45X. (COMPLETE WITH 50 BLANK SLIDES AND COVER SLIPS), STAND SOLID UNIFORM STAND INCLINABLE AT 90, TUBE DIAMETER 44MM, LENGTH 160 MM AND PROVIDED WITH TRIPLE NOSE PIECE. COARSE FOCUSING BY RACK AND PINION, FINE MOTION WITH A MICROMETER SLOW MOTION KNOBS FIXED ON BOTH SIDES. STAGE AND CONDENSER A