300 lines--我搜100

$Holographic diffraction grating 300 lines 1mm Glass engraving Teaching demonstration optical instrument Spectroscopic analysis$

👍: 100.0%

$23.6

47.20

$Holographic reflection spectroscopic grating 300 lines 1mm teaching demonstration physical optics spectrum diffraction grating$

👍: 100.0%

$24.5

49.00

$Diffraction grating 300 lines 1mm Optical teaching experiment Transmission grating Spectrophotometer Customizable$

👍: 0.0%

$7.2

14.40