Refractor : প্রতিসারক মাধ্যম; প্রতিসারক দূরবীক্ষণ;
Related Words
refractor  refractoriness  refractory  See Words Also In
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Appropriate Prepositions
Adjacent to (সন্নিহিত): His house was adjacent to the bridge.
Care of(যত্ন নেওয়া): You should take care of your health.
Enter into (আলোচনা করতে আরম্ভ করা): Let’s not enter into details at this stage.
Fail in (ব্যর্থ হওয়া): He failed in getting internet connection in his room.
Look for (খোঁজা): I was looking for the lost phone.
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Idioms
At random (indiscriminately—এলোপাথাড়ি-adv.) He talks at random like a mad man.
Call in question (সন্দেহ করা): No one can call his honesty in question.
Gain Ground (সুবিধা পাওয়া): The wise are said to gain the ground in the long run.
In a fix (মুশকিলে পতিত হওয়া): The man is in a fix with his new hairstyle.
Rank and file (সাধারণ লোক): We should pay attention to the rank and file of the country.