A) 169 : 25
B) 81 : 16
C) 25 : 1
D) 9 : 4
Correct Answer: C
Solution :
Slit width ratio \[=4:9;\]hence \[{{I}_{1}}:{{I}_{2}}=4:9\] \[\therefore \frac{a_{1}^{2}}{a_{2}^{2}}=\frac{4}{9}\Rightarrow \frac{{{a}_{1}}}{{{a}_{2}}}=\frac{2}{3}\] \[\therefore \frac{{{I}_{\max }}}{{{I}_{\min }}}=\frac{{{({{a}_{1}}+{{a}_{2}})}^{2}}}{{{({{a}_{1}}-{{a}_{2}})}^{2}}}=\frac{25}{1}\]
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