Civil Services UPSC EPFO (EO/AO) Mock Test 2023 General Science Physics Optics

_________ କୁ ଗୋଲାକାର ଦର୍ପଣ କୁହାଯାଏ |

1
କେବଳ ଉତ୍ତଳ ଦର୍ପଣ 
2
କେବଳ ଅବତଳ ଦର୍ପଣ 
3
ଉତ୍ତଳ  ଏବଂ ଅବତଳ ଦର୍ପଣ 
4
ସାଧାରଣ ଦର୍ପଣ 
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