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  • Figure 10 5 shown a two-slit arrangement with a source which emits unpolarised light P is a polarizer with axis whose direction is not given If I0 is the intensity of the principal maxima when no polarizer is present

Figure 10.5 shown a two-slit arrangement with a source which emits unpolarised light. P is a polarizer with axis whose direction is not given. If I0 is the intensity of the principal maxima when no polarizer is present, calculate in the present case, the intensity of the principal maxima as well as of the first minima.

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The amplitude of wave in normal/perpendicular polarization

A\perp =A_{\perp }^{0}\left ( \sin\left ( kx- \omega t \right )+\sin (kx-\omega t+ \phi) \right )

The amplitude of wave in parallel polarization

A\parallel =A_{\parallel}^{0}\left ( \sin\left ( kx- \omega t \right )+\sin (kx-\omega t+ \phi) \right )

The intensity of the wave at the first minima with a polarizer

\left | A_{\perp }^{0} \right |^{2}\left ( 1-1 \right )+\frac{\left | A_{\perp }^{0} \right |^{2}}{2}= \frac{I_0}{8}

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Gurleen Kaur

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