Wave Optics · JEE Main previous year questions

2002 1 question

1. Q1322002 · 27 Apr 2002 · Shift 1

   Wavelengths of light used in an optical instrument are ${\lambda }_1=4000\mathring{A}$ and ${\lambda }_2=5000\mathring{A}$, then ratio of their respective resolving powers (corresponding to ${\lambda }_1$ and ${\lambda }_2$ ) is :

   1. A.$16:25$
   2. B.$9:1$
   3. C.$4:5$
   4. D.$5:4$
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   Answer: D