The Poisson Bright Spots Presenter Products Category : Science experiment kits > Optical Instruments INQUIRY Details Operating voltage 220V/110V, case made of iron,input green semiconductor laser,wavelength 532nm,Poisson spot pieces can be installed on the moving ruler,with a white image plate and a propeller strut. Send Inquiry Name:* E-mail:* Tel: Content:* Verification Code:* (All * must be filled in) [ Previous: ] [ Next: ] Related Products Light Refraction and Reflection Newtons Seven-Disc Interference and Diffraction of Light(Red) Slit Film Optical Full Set Light Propagation Optical Glass Brick Three-Color Light Source A