Question

what angle would the axis of a polarizing filter need to make with the direction of polarized light of intensity 1.00 kw/m2 to reduce the intensity to 50.0 w/m2?

Answer 1

Angle of axis of a polarizing filter would be 0.22°.

Malus law explains, "whenever a light beam is passing through any polarizer, the intensity of the resultant beam is less than that of the incident beam." Let I and I₀ be the resultant and incident beam, and ∅ be the angle of the polarizer. So, the resultant intensity is given by:

I = I₀cos²∅

cos²∅ = $\frac{I}{I_{0} }$

          = $\frac{50W/m^{2} }{1.0 kW/m^{2} }$

          = 0.05

cos∅ = $\sqrt{0.05}$

    ∅ = 0.22°

What's the process of a polarizing filter?

Light that vibrates in one way can pass through polarizing filters, while light that vibrates in the opposite direction is absorbed. Scientific tools make considerable use of these filters.

Why, in physics, is a polarizing filter useful to a photographer?

Circular polarizing filters decrease reflections coming from the objects you are photographing and screw into the thread of your lens. This may result in a darker, richer sky color and the ability to see through water and windows that would otherwise just reflect surface reflections.

What impact does polarization have?

Polarization is a phenomenon that makes batteries function worse. The electrode potential is displaced from equilibrium by this impact. Activation and concentration are the two different kinds of polarization.

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