MCQ
An electron microscope is superior to an optical microscope in
- ✓Having better resolving power
- BBeing easy to handle
- CLow cost
- DQuickness of observation
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$(A)$ $\left|f_1\right|=3 R$ $(B)$ $\left|f_1\right|=2.8 R$ $(C)$ $\left| f _2\right|=2 R$ $(D)$ $\left|f_2\right|=1.4 R$