Interactive Simulator · Polarisation
Two Filters, One Angle
Rotate the second polariser and watch the transmitted intensity follow Malus law, I = I₀ cos²θ: bright when aligned, dark when crossed at 90°.
Mission
Predict the transmitted intensity when the two polarisers are crossed at 90°.
Streak 0Best 0
When the two polarisers are crossed at 90°, the transmitted intensity is:
angle θ30°
transmitted I / I₀0.75
Malus law: I = I₀ cos²θ, with θ the angle between the transmission axes.