polarizer-chain-depth-three-row-scan - Electromagnetic Waves and Polarization Step by Step

One, two, and three checked polarizer stages make the ordered intensity product explicit. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.

highlighted = computed this step

One polarizer stage takes twenty-five to nine

One factor 3/5 turns source 25 watts per square metre into 9 watts per square metre.

25\ \text{W}/\text{m}^{2}\xrightarrow{\frac{3}{5}}9\ \text{W}/\text{m}^{2}

Two stages multiply in order

A second same factor starts from 9 watts per square metre and lands at 81/25 watts per square metre. The source is not reused; the stage output becomes the next input.

25\ \text{W}/\text{m}^{2}\xrightarrow{\frac{3}{5}}9\ \text{W}/\text{m}^{2}\xrightarrow{\frac{3}{5}}\tfrac{81}{25}\ \text{W}/\text{m}^{2}

Three stages show the continuing product

The third row appends factor 4/5 and reaches 1296/625 watts per square metre. The fractions stay exact rather than being rounded.

25\ \text{W}/\text{m}^{2}\to9\ \text{W}/\text{m}^{2}\to\tfrac{81}{25}\ \text{W}/\text{m}^{2}\to\tfrac{1296}{625}\ \text{W}/\text{m}^{2}