1068-40-000 Global Laser | 1068-40-000 Laser Module, 633nm 1.5mW, Continuous Wave, TTL control Ellipse pattern +4.5 → +5.5 V | 111-346 | RS Components
N-LHP-993 HeNe Laser
20mW 633nm Red HeNe Laser System – Meredith Instruments
Example: 633 nm laser light is passed through a narrow slit and a diffraction pattern is observed on a screen 6.0 m away. The distance on the screen. - ppt download