MCQ
Black hole is a
- AHole in the ozone layer of atmosphere
- BHole in earth's centre
- ✓Highly dense matter available in the atmosphere
- DHole in troposphere
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$(A)$ For $n=1.42, h=50 \ cm$ $(B)$ For $n=1.35, h=36 \ cm$ $(C)$ For $n=1.45, h=65 \ cm$ $(D)$ For $n=1.48, h=85 \ cm$
