Question 105: Waves Optics

Question

'$$n$$' polarizing sheets are arranged such that each makes an angle $$45^{\circ}$$ with the preceeding sheet. An unpolarized light of intensity I is incident into this arrangement. The output intensity is found to be $$I / 64$$. The value of $$n$$ will be:

Accepted Answer

After passing through first sheet
$$
I_1=\frac{I}{2}
$$
After passing through second sheet
$$
I_2=I_1 \cos ^2\left(45^{\circ}ight)=\frac{I}{4}
$$
After passing through $n^{	ext {th }}$ sheet
$$
\begin{aligned}
& I_{\mathrm{n}}=\frac{I}{2^{\mathrm{n}}}=\frac{I}{64} \\
& n=6
\end{aligned}
$$

Answer

4

Answer

5

Answer

3

Answer

6

Waves Optics

'$n' polarizing sheets are arranged such that each makes an angle 45^{\circ} with the preceeding sheet. An unpolarized light of intensity I is incident into this arrangement. The output intensity is found to be I / 64. The value of n$ will be:

Choose the correct answer: