Teaching UP TGT Mock Test Series 2025 General Science Physics

ପାୱାରର ଦୁଇଟି ଲେନ୍ସ -15 D ଏବଂ +5 D ପରସ୍ପର ସହିତ ଯୋଗାଯୋଗ ରେ ରଖାଯାଇଛି | ମିଶ୍ରଣର କେନ୍ଦ୍ରବିନ୍ଦୁ ଦୈର୍ଘ୍ୟ ହେଉଛି:

1
-10 ସେମି 
2
+10 ସେମି 
3
-20 ସେମି 
4
+20 ସେମି 
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