Polarizer Light Source Filter Polarizing Film Optical Instrument Display Polarizer 3DVR Polarizing Film Sheet 10x10cm 3DVR Lens Optical Polarization Film for Educational Physics Photography LightingFeatures:contrast linear polarizing film transmission of unpolarized light from 380700nm.Make the study of light and color fun and memorable.for Ideal for a range of imaging applications, experiments involving birefringance, light scattering and more.Widely used in photography setups, science projects and learning physics.Specifications:Material: PVASize: Approx. 10x10cm/3.94x3.94 inchOptical Type: contrast transmissiveTransmittance: single(42%) ; crossed(≦0.005%)Color: neutral grayPolarizing Efficiency: 99.99%Film Thickness: 150mPolarization